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1: Tape Trail, RE: Arcam Delta 100 (0.00)
Posted by Werner on 2022-04-05, 08:24:04 (84.196.188.150)
See link. .......
2: Tape Trail, RE: Sleeve City ATR Magnetics Type I Cassette Tape.... (0.00)
Posted by Werner on 2022-04-05, 08:22:14 (84.196.188.150)
The cobalt tape, sourced from NAC, is vile. ATR's ferric tape mentioned above is plain and mediocre. I measured 100s of cassettes in the past three years, see link below. .......
3: Tape Trail, RE: Question about playback frequency response on cassette decks (0.00)
Posted by Werner on 2020-02-21, 01:12:12 (165.225.88.137)
"Do most decks have the possibility to adjust the playback response? Do they have a pot that can alter the playback frequency response?" Yes. Many decks have provisions. Get the service manuals. ::: T .......
4: Tape Trail, measurements and comparisons (0.00)
Posted by Werner on 2018-10-17, 00:19:55 (213.251.65.251)
I spent a day comparing Fox to competitors. .......
5: Vinyl Asylum, RE: My (mechanical engineer's) 2-cents Worth . . . (0.00)
Posted by Werner on 2013-04-07, 22:59:44 (213.181.51.95)
"My rationale is that resampling from a higher sampling rate to a lower sampling rate can only degrade the recording" But that is exactly what the ADC is doing. It samples at a very high rate, and the .......
6: Vinyl Asylum, I don't post often here anymore, but ... (0.00)
Posted by Werner on 2013-03-21, 23:38:58 (213.181.51.95)
JaS is a great guy. .......
7: Vinyl Asylum, RE: Transcriptors! (0.00)
Posted by Werner on 2012-10-29, 23:27:16 (213.181.51.95)
"So, it is fair to assume that the table used in the movie would have been labelled as a Transcriptors." Yes, we all know that. Noone is contradicting this. John Michell was a long-time contributor of .......
8: Vinyl Asylum, the full full story ... (0.00)
Posted by Werner on 2012-10-28, 23:29:21 (213.181.51.95)
... is that Michell Engineering was active in the movie/studio business, working for Kubrick on many projects (such as the 2001 spacecraft models, mostly based on Airfix parts). Michell and Transcript .......
9: Computer Audio Asylum, RE: This is not an 'iOS6 experience'. It's a botched upgrade.... (0.00)
Posted by Werner on 2012-10-24, 22:10:41 (213.181.51.95)
Apple gives the choice between wireless and wired/iTunes-based for the upgrade. Both should be fine. Obviously the latter wasn't. Botched? Yes, by Apple. .......
10: Computer Audio Asylum, RE: I fear the worst, after a horrible iOS6 experience (0.00)
Posted by Werner on 2012-10-23, 22:37:45 (213.181.51.95)
"but we have excellent internet speeds and rock solid wifi" And so have I. The only issue (if at all) I can imagine is that I used an XP SP3 PC dating from ... 2004. It is my main machine, lovingly ma .......
11: Computer Audio Asylum, I fear the worst, after a horrible iOS6 experience (0.00)
Posted by Werner on 2012-10-23, 00:23:37 (213.181.51.95)
I totally wasted last weekend updating one iPad 2 and one iPod from iOS5 to iOS6. Before I started everything worked smoothly. The two updates took hours of anguish, due to initial failures after whic .......
12: Vinyl Asylum, I wrote a series of articles just on that (0.00)
Posted by Werner on 2012-10-06, 01:18:51 (84.197.224.111)
.. .......
13: Digital Drive, RE: Hipster fad? (0.00)
Posted by Werner on 2012-09-09, 23:41:46 (213.181.51.95)
And Burmester, in the early 90s. Their first standalone DAC used an instrumentation DAC chip, and could optionally be operated with its digital filter disabled. The magazines swooned over the 'perfect .......
14: Digital Drive, RE: Oversampling vs. Upsampling: Marketing Speak (0.00)
Posted by Werner on 2012-09-09, 01:47:16 (84.197.224.111)
"which shows a graphic of perfect 1Khz square wave" That is a party trick, often used for selling NOS digital audio. Ask yourself: where does that 'perfect' square wave originate from? It has also not .......
15: Digital Drive, if you can DIY: Uwe Beis' ADC is excellent (0.00)
Posted by Werner on 2012-09-08, 01:42:43 (84.197.224.111)
See link. .......
16: Vinyl Asylum, RE: Plotting Cartridge Frequency Response (Shure M97xE vs SAS) (0.00)
Posted by Werner on 2012-06-25, 00:23:24 (213.181.51.95)
I have measured many cartridges with that noise track. The results were entirely consistent with known responses. The whole LP is RIAA. I simply fail to see how you could imagine that there is somethi .......
17: Vinyl Asylum, RE: Plotting Cartridge Frequency Response (Shure M97xE vs SAS) (0.00)
Posted by Werner on 2012-06-24, 22:39:20 (213.181.51.95)
What makes you think that? .......
18: Vinyl Asylum, yep (nt) (0.00)
Posted by Werner on 2012-06-19, 22:04:09 (213.181.51.95)
.. .......
19: Vinyl Asylum, RE: Plotting Cartridge Frequency Response (Shure M97xE vs SAS) (0.00)
Posted by Werner on 2012-06-18, 22:30:45 (213.181.51.95)
I convolved with the impulse response of a +3dB/octave slope. AFAIK the Grado PH-1 has no explicit input capacitor, so its input capacitance is made up of stray C only, perhaps not more than 30-40pF .......
20: Vinyl Asylum, RE: Plotting Cartridge Frequency Response (Shure M97xE vs SAS) (0.00)
Posted by Werner on 2012-06-18, 07:20:33 (84.197.224.111)
For reference here my HFN-disc based measurements of the standard M97xe versus load capacitance. .......
21: Vinyl Asylum, RE: In praise of IKEA "Expedit" bookcases for LP storage. :-)) ... (0.00)
Posted by Werner on 2012-06-17, 07:58:49 (84.197.224.111)
Moving into the new Music Room (work in progress, mostly tidying up and fixing acoustics - it sounds like a swimming pool for now). I have two 4x4s and one 2x2. They all got add-on backs. LPs .......
22: Vinyl Asylum, RE: If you read the comments on that video,... (0.00)
Posted by Werner on 2012-06-05, 22:08:18 (213.181.51.95)
"but there were some overtones from instruments that were very believable as well that were represented." The point is that harmonic distortion, viewed in a spectrograph, is indistinguishable from ove .......
23: Inmate Systems, Werner's living room (temporary) (0.00)
Posted by Werner on 2012-05-19, 05:53:27 (84.197.224.111)
Werner 's living room (temporary) System
IP Address: 84.197.224.111
Last Update: May 19, 2012 at 05:53:27
Amplifier: Cyrus One
Preamplifier (or None if Integrated): ..
Speakers: Tan .......
24: Computer Audio Asylum, RE: What am I seeing in this spectrum screen shot ? (0.00)
Posted by Werner on 2012-03-22, 23:28:54 (194.78.209.104)
See link. Your spectrograph is not very clear, but normally a hard ridge indicates a digital conversion in the LP's source. This can be a master, a production copy, or a digital delay in the cutter pa .......
25: Computer Audio Asylum, RE: Bit depths. I am lacking some understanding. (0.00)
Posted by Werner on 2012-03-12, 00:12:19 (194.78.209.104)
"Contrary to popular belief, there is no physical limit on the possible noise out of a DAC" ROTFL. This gem was posted on my birthday and I totally missed it. Thank goodness I found it today. You made .......
26: Computer Audio Asylum, RE: Concept of "bandwidth" in non-linear systems: ill-defined. (0.00)
Posted by Werner on 2012-03-10, 00:07:06 (91.177.155.115)
Tony, And now please a reply that is pertinent to my posting, and without that pompous diarhea of yours that only shows that you have studied a bit of math a loooong time ago and that you entirely lac .......
27: Computer Audio Asylum, RE: And yet, there are limits...Put it this way (0.00)
Posted by Werner on 2012-03-09, 23:51:55 (91.177.155.115)
Ah, Fourier. The bloke you don't seem to understand. As you also don''t seem to get the basics of auditory perception. At the risk of driving you up the curtains: the concept of 'harmonics' itslef is .......
28: Computer Audio Asylum, RE: And yet, there are limits...Put it this way (0.00)
Posted by Werner on 2012-03-09, 04:48:53 (91.177.117.16)
"explain why there is no need for digital replay to have sufficient bandwidth." Any system needs sufficient bandwidth. Stating the opposite would be absurd. Assume, for the sake of argument (meaning: .......
29: Computer Audio Asylum, RE: And yet, there are limits...Put it this way (0.00)
Posted by Werner on 2012-03-08, 22:39:34 (91.177.117.16)
"it was a design criterion ... for a hifi power amplifier to have a clean 10kHz response square wave reponse, meaning extension to 200 kHz. 192k sampling rate gives a 90k roll off, which is a reasonab .......
30: Computer Audio Asylum, RE: Misinformation (0.00)
Posted by Werner on 2012-03-07, 11:28:35 (91.177.176.191)
How much phase shift? .......
31: Computer Audio Asylum, RE: Misinformation (0.00)
Posted by Werner on 2012-03-07, 02:40:09 (194.78.209.104)
"The phase-shifts caused by brick-wall filters are virtually eliminated. " Which phase shifts? .......
32: Digital Drive, RE: Article on Samples Rates and Bit Depth and how more is not better (0.00)
Posted by Werner on 2012-03-06, 22:29:52 (194.78.209.104)
"High-res music of the same mix sounds different than redbook on the majority of systems. I applaud real researchers who try to find out WHY. " You state that as a fact. Where then is the evidence in .......
33: Digital Drive, RE: Article on Samples Rates and Bit Depth and how more is not better (0.00)
Posted by Werner on 2012-03-06, 03:12:56 (194.78.209.104)
You don't need a model of human hearing to determine whether, or not, the presence of ultrasonics matter in the replay of music. And the ideal reconstructor has been known for over a century. We can e .......
34: Digital Drive, RE: Article on Samples Rates and Bit Depth and how more is not better (0.00)
Posted by Werner on 2012-03-05, 22:28:42 (194.78.209.104)
Not bad. But there is an error in it: "16 bit audio is commonly said to have a dynamic range of 96dB (each bit doubles the range and a doubling is about 6dB so, 6dB*16=96dB). This is incorrect. The in .......
35: Vinyl Asylum, RE: "there is little on LPs past 15-kHz." (0.00)
Posted by Werner on 2012-01-19, 23:41:15 (91.177.37.220)
Whether fundamental or harmonic doesn't matter at all. A spectrum is a spectrum. In fact even referring to fundamentals in a time-variant signal like music is fundamentally wrong, but oh well ... I a .......
36: Vinyl Asylum, RE: Compare to Tom Jung's comments... (0.00)
Posted by Werner on 2012-01-19, 08:37:33 (81.242.96.58)
All very reliable, with things like "With PCM, the brick-wall filter at approximately 20kHz has so much phase shift that it manifests itself down at 2kHz and 3kHz" Since the early 90s just about every .......
37: Vinyl Asylum, RE: Phono stage and cartridge matching (Long)... (0.00)
Posted by Werner on 2012-01-14, 00:17:52 (91.177.183.42)
There is no magic in electric circuit design. They opted for a single 9V battery as the sole supply (i.e. no internal DC/DC upconvertor), they have to live with the consequences. As have their custome .......
38: Vinyl Asylum, RE: You're Welcome! (0.00)
Posted by Werner on 2012-01-10, 22:21:17 (194.78.209.104)
"I guess I'm not familiar with Allen Wright's RIAA mod. Does it apply to playback equalization? I'm familiar with a modification to the RIAA record equalization curve that rolls off frequencies above .......
39: Vinyl Asylum, RE: Phono stage and cartridge matching (Long)... (0.00)
Posted by Werner on 2012-01-10, 22:16:52 (194.78.209.104)
The weird gain structure and potential overload problems were reported in Ken Kessler's review in Hifi News in September 2010. You can find the tech report in the link below, but you'll have to regist .......
40: Digital Drive, No. For fundamental reasons. (0.00)
Posted by Werner on 2012-01-04, 22:56:59 (194.78.209.104)
And assuming the digital chain is not deliberately modified to mimick certain physical properties of a groove-based chain. .......
41: Vinyl Asylum, Allaerts MC1b and Lyra Delos (0.00)
Posted by Werner on 2011-11-14, 22:37:37 (194.78.209.104)
Sorry, two main cartridges alternate on the Orbe/SME IV. I wanted to sell one ... but this seems very hard to do. .......
42: Vinyl Asylum, depends (0.00)
Posted by Werner on 2011-10-20, 22:08:31 (194.78.209.104)
These with a pendulum suspension can be pretty good at this. Those with an inverted pendulum (subchassis standing on springs as opposed to hanging off them) are inherently instable and may perform wor .......
43: Computer Audio Asylum, RE: Bit depths. I am lacking some understanding. (0.00)
Posted by Werner on 2011-10-15, 02:05:25 (91.177.169.4)
"This would not work properly with non-oversampling DACs, where the randomly-triggered LSB would be played "literally" instead of "averaged"" It would work. Really. Consider that what you call 'avera .......
44: Vinyl Asylum, RE: Michell Gyro SE questions (0.00)
Posted by Werner on 2011-10-13, 23:24:51 (194.78.209.104)
Step by step instructions below. Be patient, ensure a 100% stable platform, and revisit the setup after one or two weeks. .......
45: Vinyl Asylum, RE: Vinyl to Computer? (0.00)
Posted by Werner on 2011-10-11, 09:52:46 (91.177.249.57)
I detail this in a series of articles, link below. .......
46: Vinyl Asylum, RE: Please explain... (0.00)
Posted by Werner on 2011-08-21, 05:31:36 (91.177.7.77)
>> "Further, what is it that digital tends to do wrong? Exactly? >> What is it that is so hard in doing DA conversion? Exactly?" > Are you serious? Yes. People complain that digital does it all wrong. .......
47: Vinyl Asylum, RE: Any definitive information on longevity of Jico SAS styli?? (0.00)
Posted by Werner on 2011-08-17, 05:45:34 (194.78.209.104)
AFAIK the SAS is the Namiki MicroRidge, so the same longevity figures apply as stated by those manufacturers that use/used the same stylus (Shure, Lyra, AT, Benz, ...) .......
48: Vinyl Asylum, in the flesh (0.00)
Posted by Werner on 2011-08-14, 02:34:14 (91.177.108.94)
In the flesh it does look like junk, though. .......
49: Vinyl Asylum, RE: thanks! but how to check if my motor is compatible with this HR PSU? (0.00)
Posted by Werner on 2011-08-14, 02:30:53 (91.177.108.94)
The housing of the AC motor has a knurled nut below the pulley, as you can see in the picture. The housing of the DC motor is just flat, with a tiny hole for the motor spindle. .......
50: Vinyl Asylum, RE: New TDK turntable - anyone seen this? (0.00)
Posted by Werner on 2011-08-12, 10:31:22 (91.177.207.198)
It isn't that new. Has been launched many months ago. But anyway, I happened to have one in my hands only two days ago. It is a total piece of junk, with epic tonearm bearing play and the cheapest pos .......
51: Vinyl Asylum, RE: Please explain... (0.00)
Posted by Werner on 2011-08-10, 22:13:33 (194.78.209.104)
"I think it's been established that its distortions - in the frequency domain mainly - are much less objectionable than what digital tends to do wrong." You may want to study the mechanics of groove/s .......
52: Vinyl Asylum, RE: Please explain... (0.00)
Posted by Werner on 2011-08-07, 22:11:21 (91.177.206.133)
"it seems that translating bits to an analog waveform with perfect frequency and phase is *very* complex undertaking! ... The job that little stylus has to do is really nearly infinitely simpler, yes? .......
53: Vinyl Asylum, RE: Do you have the Papst three phase motor? (0.00)
Posted by Werner on 2011-08-06, 22:42:12 (91.177.213.107)
The HR is a supply for DC motors. No need to confuse the OP. .......
54: Vinyl Asylum, RE: room with a vu? (0.00)
Posted by Werner on 2011-08-02, 22:06:41 (194.78.209.104)
Indeed. Magnetic tape and the vinyl cutting path offer a hidden subtle compression system, that is frequency-dependent to boot. As the listening end of the chain more often than not is not at realisti .......
55: Digital Drive, RE: Null Test Difference - test to measure real fidelity of a device (0.00)
Posted by Werner on 2011-07-28, 22:26:49 (91.177.95.177)
Actually during the first periods of this initiative they got plenty of editorial coverage in a certain UK magazine. A magazine whose editor shortly later was hired to become VP of M for NordOst ;-) .......
56: Digital Drive, RE: Null Test Difference - test to measure real fidelity of a device (0.00)
Posted by Werner on 2011-07-27, 22:15:10 (194.78.209.104)
As Tony already indicated, time alignment is going the be the Achilles heel here. The fundamental reason for this is that a stream of samples in the digital domain is NOT the actual signal. The actual .......
57: Digital Drive, RE: Null Test Difference - test to measure real fidelity of a device (0.00)
Posted by Werner on 2011-07-26, 22:39:08 (194.78.209.104)
[i]The two signals are placed in a sort of sequencer, then time alignment on the first samples is needed [/i] Could you explain in total detail -what capture sampling is used -how the time alignment i .......
58: Vinyl Asylum, RE: quartz = waste? (0.00)
Posted by Werner on 2011-07-18, 00:22:39 (91.177.15.213)
"but you would have to make the loop slow enough" Which is what I said. The resulting closed-loop speed control only controls drift then. There is no need to use the same control rule during start-up .......
59: Vinyl Asylum, RE: quartz = waste? (0.00)
Posted by Werner on 2011-07-17, 22:29:44 (91.177.197.60)
"that both actually sensed the speed of the platter and not just of the motor (not sure about the HKs - haven't checked these out yet...). So in both of these designs the belt transmission could be re .......
60: Vinyl Asylum, RE: Why did the winds of change blow towards Moving Coil carts? nt (0.00)
Posted by Werner on 2011-07-07, 22:04:50 (194.78.209.104)
A couple of remarks. 1) it might be that the lacquer is so soft that playback requires the lowest possible VTF. That restricts one to MMs. 2) the in-built monitoring amplifiers of cutting lathe racks .......
61: Digital Drive, RE: I Think There Is............. (0.00)
Posted by Werner on 2011-06-26, 02:38:10 (91.177.151.26)
"The other problem is while some DAC chips are CMOS, they’re often combined with other digital audio chips (SRCs, receivers, etc.) that are not." LOL. You'd be hard pressed to make a receiver, SRC, or .......
62: Digital Drive, RE: I Think There Is............. (0.00)
Posted by Werner on 2011-06-15, 23:57:14 (194.78.209.104)
Knowledgeable as ever, not? The business rationale behind the move from multi-bit DACs to delta-sigma techniques in the early 90s was exactly that this allowed DACs to be processed on CMOS, thus benef .......
63: Vinyl Asylum, nothing you haven't seen before ... (0.00)
Posted by Werner on 2011-05-23, 22:34:45 (194.78.209.104)
.......
64: Digital Drive, RE: Hmmmm..... (0.00)
Posted by Werner on 2011-05-17, 00:38:19 (194.78.209.104)
Aber natuerlich ... oder vielleicht nicht. Not all that wiggles is equal to the required reconstructor. A trace like that won't tell you the exact cutoff frequency, which should be Fs/2, and the exact .......
65: Digital Drive, RE: Interpolating DACs (0.00)
Posted by Werner on 2011-05-12, 22:23:38 (194.78.209.104)
GTE indeed boast about their 'ideale Impulsantwort' (red), compared to the 'herkmmlichen digitalen Filterung' (black). .......
66: Digital Drive, RE: Interpolating DACs (0.00)
Posted by Werner on 2011-05-11, 22:34:41 (194.78.209.104)
Harman Kardon once had one or two CD players that used an analogue ramp generator to 'connect the dots'. The dots were generated by two time-delayed R2R DAC chips. Luxman once had a very expensive pla .......
67: Computer Audio Asylum, RE: Possible but......................... (0.00)
Posted by Werner on 2011-05-10, 22:55:23 (194.78.209.104)
"There are lots of software packages that will convert 176/24 to 44/16 for creating Redbook disks. I think that KH's very simple algorithm will probably yield the best..." The only downsampler av .......
68: Critic's Corner, Actually ... (0.00)
Posted by Werner on 2011-05-02, 00:18:57 (194.78.209.104)
Years ago I measured the w&f spectrum of an SL-1200Mk2. Compared to a (very reputed) belt drive I measured at the same time the Technics had -less wow ( -same low-f flutter (>4Hz) -more high-f flutte .......
69: Digital Drive, RE: my two cents on high rez downloads (0.00)
Posted by Werner on 2011-04-27, 22:29:02 (194.78.209.104)
If you look at the human auditory perception mechanisms used in listening to two-speaker stereo then you'll find that a channel separation of 30dB is sufficient to give the perception of total separat .......
70: Vinyl Asylum, RE: what cart would you put on a Michell Techno Arm? (0.00)
Posted by Werner on 2011-04-27, 03:45:22 (194.78.209.104)
"but I have no problems with putting too much cart for my system on the arm and then playing catch up.. " The salient point is, pun intended, that during that phase of catch-up your expensive cartridg .......
71: Vinyl Asylum, RE: Am I crazy, or does a digital rip from vinyl sound better than a production CD? (0.00)
Posted by Werner on 2011-04-24, 05:48:33 (91.177.20.2)
99.9% of all digital anti-aliasing and anti-imaging filters used in consumer and pro audio since the late 80s are linear phase. Period. "I can't see that down converting would introduce additional pha .......
72: Digital Drive, RE: my two cents on high rez downloads (0.00)
Posted by Werner on 2011-04-23, 22:14:41 (91.177.212.9)
Sorry, but the majority of anti-aliasing and reconstruction filters in the past two decades has been linear phase. .......
73: Vinyl Asylum, RE: Second Tonearm to Accompany SME V is a MORCH UP4 (0.00)
Posted by Werner on 2011-04-16, 07:51:09 (91.177.18.208)
Keep densodamp and Orbe platter out of your basket. A Gyro is a Gyro and should not attempt to be an Orbe. Getting the Orbe clamp and bearing spindle would be nice, though. But then you'd need the mos .......
74: Vinyl Asylum, RE: Thank you for your post. :-)) ... (0.00)
Posted by Werner on 2011-04-08, 00:49:17 (194.78.209.104)
Geiger make styli, essentially FG1 (=VdH1), FG2, (VdH2) and FGS. Don't know who makes stylus+cantilever assemblies. This may indeed be Benz. -- I believe Geiger recently terminated the FG1 (VdH1). Thi .......
75: Vinyl Asylum, RE: What is a "Special Elliptical" stylus profile? (0.00)
Posted by Werner on 2011-04-08, 00:44:05 (194.78.209.104)
"Geiger now making VdH?? That WAS a surprise to me!" Come on. He *always* made the VdHs. AJ VdH teamed up with FG in the 70s to implement his ideas on tips. Then they got into a mess regarding trade m .......
76: Vinyl Asylum, RE: What is a "Special Elliptical" stylus profile? (0.00)
Posted by Werner on 2011-04-06, 23:05:27 (194.78.209.104)
"AT make a deal in distinguishing their MicroLine from other types." How that? It isn't even theirs. There are only a handfull of stylus manufacturers. About all cartridge manufacturers buy from these .......
77: Vinyl Asylum, self-explanatory (0.00)
Posted by Werner on 2011-03-27, 00:59:54 (91.177.126.203)
.. .......
78: Vinyl Asylum, RE: Thanks for that, but ... (0.00)
Posted by Werner on 2011-03-24, 07:21:59 (194.78.209.104)
Just to indicate the DL-S1's context. .......
79: Vinyl Asylum, RE: Speaking of gain issues.... (0.00)
Posted by Werner on 2011-03-24, 06:43:59 (194.78.209.104)
FWIW, when the DL-1S got introduced to the European markets in 1993 or so it was marketed together with the matching (in specification and colour scheme) AU-1S transformer. Both cost about US$1300, ea .......
80: Vinyl Asylum, a bit like these ... (0.00)
Posted by Werner on 2011-02-24, 00:44:27 (194.78.209.104)
.......
81: Vinyl Asylum, RE: DL-301 MkII vs OC9/ML-II - Compliance (0.00)
Posted by Werner on 2011-02-23, 22:43:19 (194.78.209.104)
HFN&RR measured the lateral compliance of the OC9/II at resonance to be 28 cu. That is more than average for an MC. See link. .......
82: Vinyl Asylum, RE: I've gotten great results (0.00)
Posted by Werner on 2011-02-22, 03:59:25 (194.78.209.104)
And later, perhaps 2-3 years ago, it was established by HifiNews technical contributor Keith Howard that this was not an audible issue in the real world. .......
83: Digital Drive, I saw it too (0.00)
Posted by Werner on 2011-02-20, 22:42:45 (194.78.209.104)
But Pingsound ... well ... perhaps he suffers a rare disorder that makes one blind for belts. .......
84: Digital Drive, RE: DacMagic truly balanced? (0.00)
Posted by Werner on 2011-02-15, 22:12:06 (194.78.209.104)
"A balanced source will have double the RCA output voltage from its XLR outputs" Only when they share circuitry. But the OP asked if the DM was truly balanced, i.e. if the unit is balanced from the ea .......
85: Vinyl Asylum, identical LPs cannot exist (0.00)
Posted by Werner on 2011-02-14, 22:23:55 (194.78.209.104)
Its in their nature, due to the manufacturing process. .......
86: Computer Audio Asylum, RE: Suggestions on digitizing vinyl (0.00)
Posted by Werner on 2011-02-09, 23:44:58 (194.78.209.104)
It looks like you chose an external all in one device as your recorder rather than a break out box going directly to a computer. Why? 1) there is 25m between my system and my computer 2) computers d .......
87: Computer Audio Asylum, RE: Suggestions on digitizing vinyl (0.00)
Posted by Werner on 2011-02-08, 04:44:04 (194.78.209.104)
I've got an article series describing just that. See link below. .......
88: Digital Drive, RE: DacMagic truly balanced? (0.00)
Posted by Werner on 2011-02-07, 23:28:48 (194.78.209.104)
It uses one stereo DAC per channel, preceded with a DSP chip. So it has all ingredients to be balanced from the digital domain to the outputs. .......
89: Vinyl Asylum, RE: Has this been tried - using platter to platter drive (0.00)
Posted by Werner on 2011-02-03, 22:52:36 (194.78.209.104)
A DIYer did so many many years ago. .......
90: Vinyl Asylum, RE: If I can be a bother about this high res digital thing again... (0.00)
Posted by Werner on 2011-01-24, 22:50:25 (194.78.209.104)
This is 24 bit proper. But next time please post much shorter snippets. .......
91: Digital Drive, good to know that ... (0.00)
Posted by Werner on 2011-01-20, 22:50:43 (91.177.199.191)
vinyl isn't a frustrating endeavour. .......
92: Digital Drive, RE: Are we too paranoid about the quality of music reproduction from digital sources? (0.00)
Posted by Werner on 2011-01-19, 23:23:28 (194.78.209.104)
I agree mostly. In fact I've never suffered digital harshness. My first CD player, a Sony in 1989, was dull and boring. Not harsh. My later Marantz was perhaps a bit coarse. It was followed by gear f .......
93: Vinyl Asylum, RE: Thats curious Werner... (0.00)
Posted by Werner on 2011-01-18, 22:49:27 (194.78.209.104)
The effective data in the '24 bit' files are 16 bit + 8 zeroes padding, as reported by Audition. Presumably you recorded at 16 bit, or erroneously made Audacity truncate to 16 bit before saving in a 2 .......
94: Vinyl Asylum, RE: Flirting with High Resolution Digital (0.00)
Posted by Werner on 2011-01-18, 03:26:47 (194.78.209.104)
"As of this writing high resolution digital is tricky and it is easy to be fooled to thinking that you have the capability to playback high resolution digital." ...and to record high resolution digita .......
95: Vinyl Asylum, more (0.00)
Posted by Werner on 2011-01-17, 07:31:36 (194.78.209.104)
Since the late 70s many LPs have been cut through a digital delay line, as this was cheaper and easier in maintenance than a tape deck with preview heads. And no, such is never mentioned on the sleeve .......
96: Vinyl Asylum, RE: M97Xe vs system synergy (0.00)
Posted by Werner on 2010-12-20, 23:02:25 (91.177.40.239)
Felix, given the many confirmed stories of bad quality control on the 97xe, and its manufacturer reaction to this, 'respect' is one thing it certainly does not deserve. .......
97: Vinyl Asylum, RE: Interesting! Thanks, Werner.... (0.00)
Posted by Werner on 2010-12-14, 10:10:02 (91.177.115.249)
Nope, no details. But all cartridge measurements at HFN are presented this way. See link for more, but you have to register. Which is painless. .......
98: Vinyl Asylum, RE: Interesting frequency response... (0.00)
Posted by Werner on 2010-12-12, 22:34:39 (194.78.209.104)
Here is the full SG200 system as measured by Hifi News: .......
99: Vinyl Asylum, RE: Soundsmith explains RIAA and Strain Gauge (0.00)
Posted by Werner on 2010-12-12, 03:17:42 (91.177.23.173)
"Attempts made in the distant past to absolutely correct Strain Gauge cartridges for any amplitude anomaly have required equalization circuits, which (...) introduce unwanted phase or time shifts." I .......
100: Vinyl Asylum, RE: Why the fear? (0.00)
Posted by Werner on 2010-12-06, 22:46:41 (194.78.209.104)
"The Orbe motor can't be disassembled " So you really think they embedded the motor in a place they can't get to later on? .......
101: Vinyl Asylum, Why the fear? (0.00)
Posted by Werner on 2010-12-05, 22:49:58 (194.78.209.104)
If you treat the Papst AC well, give it a tiny drop of oil once in a while and have it cleaned/serviced every 10 years it is virtually indestructable. And if needs be you can always run an Orbe with a .......
102: Digital Drive, RE: A fancy Pentium is still just a pentium (0.00)
Posted by Werner on 2010-12-02, 08:54:03 (91.177.196.7)
DACs, no matter whether we're discussing DAC chips or components, are mixed signal things, and as such Moore's law differs in meaning relative to what it does for processors resp. computers. So yes, t .......
103: Vinyl Asylum, No (0.00)
Posted by Werner on 2010-12-01, 22:27:27 (91.177.196.7)
The laptop is my first and rather unworkable rig. It prompted me into investing in a DVRA1000 DVD recorder, with further processing on the home office PC. .......
104: Vinyl Asylum, RE: All first hand experience with stand alone recorders for recording vinyl (0.00)
Posted by Werner on 2010-12-01, 11:23:57 (91.177.245.64)
I wrote an article series on this. Link below. .......
105: Vinyl Asylum, RE: Help! Is 60db of gain too low for 0.25mv MC? (0.00)
Posted by Werner on 2010-11-18, 08:32:20 (91.177.39.77)
With 0.25mV at 0dB from the cartridge and 60dB gain you won't have "far too little gain". It may perhaps be a bit borderline according to current practice, but in the 80s and 90s many MCs were around .......
106: Computer Audio Asylum, RE: Korg MR-1000 (0.00)
Posted by Werner on 2010-11-14, 00:26:24 (91.177.216.145)
"So for a 192 ADC, record at 176 or 88. For Double DSD ADC, record at regular DSD. " Following that rule you would want to exclude both 176.4 and 192, as both these speeds see the ADC in the same conf .......
107: Digital Drive, RE: A Very Basic Digital Primer? (0.00)
Posted by Werner on 2010-11-11, 00:30:07 (91.177.217.144)
Sadly most written on digital audio, especially on the net, is incomplete and/or partially wrong. Lavry's papers in his Support section, while not entirely without agenda, are generally decent, if per .......
108: Vinyl Asylum, RE: TD309 review links (0.00)
Posted by Werner on 2010-11-09, 23:38:31 (194.78.209.104)
Yes. But then it stems from the brain of a loudspeaker designer. .......
109: Vinyl Asylum, RE: LP12 , Michel Gyrodec SE, Rega P7 (0.00)
Posted by Werner on 2010-10-31, 02:39:39 (91.177.143.102)
I don't like LP12s, but the old Valhalla is nice, especially with the Ittok. If I were you I'd clean up the LP12, new belt, new springs (?), a good setup, with a better arm (Ittok, Ekos, Aro, whatever .......
110: Vinyl Asylum, RE: What is meant be "digital mixing" and "digital mastering" on early 80's LPs? (0.00)
Posted by Werner on 2010-10-25, 22:49:33 (194.78.209.104)
>There were no true digital mixing boards in the early 80s. Actually there were a few. Decca and Soundstream. But there were obviously limited compared to analogue boards. .......
111: Vinyl Asylum, RE: What is meant be "digital mixing" and "digital mastering" on early 80's LPs? (0.00)
Posted by Werner on 2010-10-24, 23:47:47 (194.78.209.104)
Yep, you had 14, 16 and 18 bit, and 44k, 48k, and 50k sample rate. You could hunt the net for information on the first digital recording systems by Denon, Soundstream, and Decca. .......
112: Vinyl Asylum, RE: The biggest drawback to vinal that no one is talking about (0.00)
Posted by Werner on 2010-10-20, 08:17:31 (91.177.41.14)
"cuts that blow anything that digital currently has to offer away such as "Money For Nothing" by Dire Straits" You mean the Money for Nothing that was recorded digitally? .......
113: Vinyl Asylum, Gorgeous (0.00)
Posted by Werner on 2010-10-10, 22:48:24 (194.78.209.104)
When I saw your first picture I was disappointed, thinking you stole it from an 80s promo leaflet. .......
114: Digital Drive, RE: no-copy setting on CD? (0.00)
Posted by Werner on 2010-10-06, 00:24:01 (194.78.209.104)
John is correct. It is utterly impossible for a CD to inhibit analogue copying. .......
115: Digital Drive, this is what you want (0.00)
Posted by Werner on 2010-10-04, 23:31:26 (194.78.209.104)
interested in trying the really-early models If you find a working Marantz or Philips CD-80 then buy it! .......
116: Digital Drive, RE: Non-Os add "information". (0.00)
Posted by Werner on 2010-10-04, 22:45:51 (194.78.209.104)
If a DAC outputs image signals then by definition it is adding information. More exactly: it is re-presenting existing information. The 'information' is not new or additional in the sense that you c .......
117: Digital Drive, RE: Just to have a point of reference - ... (0.00)
Posted by Werner on 2010-10-04, 10:34:47 (91.177.202.242)
I'm a amateur of these things, in the literal sense, not an expert. But some interest backed with two relevant engineering degrees brings one reasonably far, I guess. See image for the Meridian's phas .......
118: Computer Audio Asylum, RE: Give the guy a break. (0.00)
Posted by Werner on 2010-10-04, 08:06:17 (91.177.214.254)
I wasn't disparaging. After all, reinventing this independently is somewhat of an achievement. But the claim that this is filterless remains invalid. Might as well use a 16k-tap windowed Sinc. ::: TOP .......
119: Computer Audio Asylum, RE: The Ultimate Sample Rate Converter? (0.00)
Posted by Werner on 2010-10-04, 07:30:23 (91.177.214.254)
Did you understand what I wrote? .......
120: Computer Audio Asylum, RE: The Ultimate Sample Rate Converter? (0.00)
Posted by Werner on 2010-10-03, 23:52:53 (91.177.214.254)
Since you don't want to reply to my earlier question I'll break the news here. You've re-invented DFT-based filtering. Sorry, but that's still filtering, as temporal convolution is equivalent to spect .......
121: Digital Drive, RE: Just to have a point of reference - ... (0.00)
Posted by Werner on 2010-10-03, 13:48:54 (91.177.67.195)
an FIR filter whose impulse responses is a truncated SINC function. Most CD application half-band brickwall hardware FIR filters appear to be that, judging from the very sharp frequency response corn .......
122: Digital Drive, RE: Just to have a point of reference - ... (0.00)
Posted by Werner on 2010-10-03, 07:18:59 (91.177.62.153)
Non-apodised? .......
123: Digital Drive, RE: Thanks! Actually mid-80s. My player was basis for Meridian (0.00)
Posted by Werner on 2010-10-03, 06:43:41 (91.177.62.153)
Philips' first two generations of CD players indeed used the mono 14 bit TDA1540 DAC chips. It was not before the CD650 of 1986 that the stereo 16 bit TDA1541 made its debut. By that time the Japanese .......
124: Computer Audio Asylum, RE: The Ultimate Sample Rate Converter? (0.00)
Posted by Werner on 2010-10-03, 01:25:48 (91.177.62.153)
So, to get things straight ... You have a time series [t1 t2 t3 t4] that you transform to a frequency series [f1 f2 f3 f4]. You expand the latter then to [f1 f2 f3 f4 0 0 0 0], and perform the invers .......
125: Digital Drive, RE: Dynamic range vs signal to noise (0.00)
Posted by Werner on 2010-09-29, 02:17:58 (194.78.209.104)
True, but auditory masking plays no role in the electrical definitions of DR and SNR. There are, however, weighted DR and SNR figures that take the relevant equal loudness contours into account. ::: T .......
126: Vinyl Asylum, RE: editing / ripping software (0.00)
Posted by Werner on 2010-09-28, 09:51:34 (91.177.156.71)
See link. Newly-started article series at TNT. .......
127: Digital Drive, RE: Dynamic range vs signal to noise (0.00)
Posted by Werner on 2010-09-28, 06:23:11 (194.78.209.104)
In a perfectly linear system and assuming the same reference level for maximum signal, dynamic range and SNR are the same. In practice systems aren't linear, and a small difference in definition often .......
128: Computer Audio Asylum, RE: Not to know yet to think that one knows will lead to difficulty (0.00)
Posted by Werner on 2010-09-21, 23:17:33 (194.78.209.104)
the pan-pot vs 'real stereo' was far and away the most interesting new insight to me as an audiophile and may account for some things I've heard but never understood. I think this is the first time .......
129: Computer Audio Asylum, and now 96k to 44.1k (0.00)
Posted by Werner on 2010-09-20, 23:58:40 (194.78.209.104)
Parts of the Infinitewave test suite, downsampling from 96k to 44.1k. Top to bottom: -1kHz tones -DC to 48kHz frequency sweep The wideband spectral lines seen at the end of the latter seem to co .......
130: Computer Audio Asylum, Ah, filterless, of course ... (0.00)
Posted by Werner on 2010-09-20, 22:50:36 (194.78.209.104)
Upsampling 32 bit 44.1kHz source impulse to 88.2kHz, default settings. Top to bottom: -impulse response -frequency response -detail of transition region The right channel in the source file w .......
131: Computer Audio Asylum, found the presentation (0.00)
Posted by Werner on 2010-09-20, 04:19:51 (194.78.209.104)
See link. What you want to look at is pretty deep in the presentation. .......
132: Digital Drive, and SACD ... (0.00)
Posted by Werner on 2010-09-20, 00:46:42 (194.78.209.104)
The problem is not the medium, but rather the production values and ultimately even the musicians' skills. I'd happily listen to CDs for the rest of my life if record producers would maintain a (suff .......
133: Digital Drive, RE: a fraudulent and incompetent studio, then (0.00)
Posted by Werner on 2010-09-20, 00:16:55 (194.78.209.104)
Theoretically it could be that some digital filter was applied after recording. Theoretically, yes. But it would be pointless. It would also be functionally equal to the first step in a downsampling .......
134: Computer Audio Asylum, RE: Yet Another Resampler (0.00)
Posted by Werner on 2010-09-19, 23:00:07 (194.78.209.104)
Could you comment on your design criteria? It appears to be a clean implementation of a very long, but truncated, Sinc. It is half-band close to the central impulse, but moves away from it towards th .......
135: Computer Audio Asylum, RE: timing resolution (0.00)
Posted by Werner on 2010-09-19, 04:02:37 (91.177.143.185)
Assuming that both channels are contemporaneous at capture and reproduction then when the signal is reproduced the channel that was recorded nearer the source will on average play that smeared signal .......
136: Computer Audio Asylum, timing resolution (0.00)
Posted by Werner on 2010-09-18, 04:33:45 (91.177.175.5)
Temporally humans can resolve ~20us of inter-aural difference so 96KS/s with a timing resolution of 10us just resolves that. Interaural timing acuity is less than 20 us, IIRC. But don't worry, while .......
137: Digital Drive, RE: Too Much Faith in SRC............... (0.00)
Posted by Werner on 2010-09-17, 22:12:25 (91.177.203.220)
Why always the focus on 96 and 192? And 24 versus 16. Tests like these should be done with 44.1, 88.2, 176.4k and only 24 bit. In this case software-based SRC is perfectly valid, and when done well wi .......
138: Digital Drive, RE: Ahhh... we're being nasty now. Question was too complicated for you? (0.00)
Posted by Werner on 2010-09-17, 12:45:10 (91.177.21.119)
And what do I believe? .......
139: Digital Drive, RE: Of course it's not mechanically coupled. What theory do you favor - ... (0.00)
Posted by Werner on 2010-09-17, 10:41:16 (91.177.21.119)
Don't worry. Nothing of what you ever wrote here has had any value for me. By the way, how would you stimulate cartilage without mechanical coupling? .......
140: Digital Drive, RE: However, abstract from this one implies that it happens ... (0.00)
Posted by Werner on 2010-09-17, 09:25:59 (91.177.21.119)
And mechanically coupled into cartilage. Does your audio system couple mechanically to parts of your body? It might be possible, but as curmudgeonly JJ once remarked, if you are suffering audible in .......
141: Digital Drive, RE: a fraudulent and incompetent studio, then (0.00)
Posted by Werner on 2010-09-17, 09:18:14 (91.177.21.119)
Yes it is. And no, the spikes correspond to numerical faults in the sample stream. Very very incompetently mastered stuff. .......
142: Digital Drive, RE: The Ear is nonlinear (0.00)
Posted by Werner on 2010-09-17, 08:07:01 (91.177.21.119)
"If intermodulation takes place in a listener's ear it won't be captured by the microphones." IF is the key word. The few existing studies on this indicate that this does not happen for ultrasonics... .......
143: Digital Drive, a fraudulent and incompetent studio, then (0.00)
Posted by Werner on 2010-09-17, 08:03:20 (91.177.21.119)
Here's what I found in the excerpt Rimantas kindly sent me. There is zero modulated signal above 24kHz, except for a noise floor (possibly dither, I didn't take the time to investigate). The few wide- .......
144: Digital Drive, RE: What is the reason some still debate whether hi-rez is superior to Redbook, or... (0.00)
Posted by Werner on 2010-09-17, 02:38:20 (194.78.209.104)
No. But digital gain with a little bit of clipping, when applied after upsampling, will produce just that. FYI here is a spectral view of a real 96kHz recording. .......
145: Digital Drive, RE: What is the reason some still debate whether hi-rez is superior to Redbook, or... (0.00)
Posted by Werner on 2010-09-17, 01:55:51 (194.78.209.104)
Sorry, but I am confident it is upsampled. The drop to black at about 22kHz is just too abrupt to be natural. If you could send me a small excerpt, preferrably around one of the HF anomalies, I'd be h .......
146: Digital Drive, RE: What is the reason some still debate whether hi-rez is superior to Redbook, or... (0.00)
Posted by Werner on 2010-09-17, 00:29:44 (194.78.209.104)
That looks like a low-res recording upsampled to 96kHz, and then with two or three things going wrong, like digital clipping. .......
147: Digital Drive, RE: Another versions are that ultrasonics modulate audible frequencies,... (0.00)
Posted by Werner on 2010-09-16, 22:43:47 (194.78.209.104)
".. and that two ultrasonic signals of different frequencies can produce lower-frequency signal through nonlinear interaction." Two remarks: 1) for this to happen in air the ultrasonic sound pressure .......
148: Vinyl Asylum, ...creates a huge secondary resonance in-band (0.00)
Posted by Werner on 2010-09-15, 22:17:35 (194.78.209.104)
see pic .......
149: Digital Drive, LOL (0.00)
Posted by Werner on 2010-09-15, 22:12:30 (194.78.209.104)
Actually, what I meant to say is that "to Listen is all that matters" which is something that some here, in the heat of discussion, often seem to forget. .......
150: Digital Drive, RE: Not quite (0.00)
Posted by Werner on 2010-09-14, 22:50:25 (194.78.209.104)
For clarity: I was referring to 'Listen'. Which is indeed all that matters. .......
151: Digital Drive, RE: So By Craven's Description........... (0.00)
Posted by Werner on 2010-09-13, 08:37:34 (91.177.237.100)
Perhaps high end pro ADCs also use half band filters. Trust me, they do. You can check the datasheets of the top products from Crystal, Burr Brown, Wolfson, ... AFAIK there has been one single Cryst .......
152: Digital Drive, RE: So By Craven's Description........... (0.00)
Posted by Werner on 2010-09-13, 00:06:14 (194.78.209.104)
The article referred to was written by a student. I scanned through it quickly, and it seems to contain a useful (Todd!) description of oversampling filter theory and practicalities (including the opt .......
153: Digital Drive, RE: Trying to understand Apodising Filters (0.00)
Posted by Werner on 2010-09-12, 23:00:22 (194.78.209.104)
I hate to sound smug No need to worry. .......
154: Digital Drive, RE: Black Art caused by Sony Philips failure (0.00)
Posted by Werner on 2010-09-12, 04:37:10 (91.177.203.106)
So tell me: When I take material that was recorded in hi-res that I want to downsample to Red Book format, what filtering am I supposed to use to monitor my work? In a narrow context: the ideal one, .......
155: Digital Drive, RE: So By Craven's Description........... (0.00)
Posted by Werner on 2010-09-12, 04:04:37 (91.177.203.106)
What you show is half-band, i.e. with only ever 50% attenuation at Fs/2. The trick is to reach 100% attenuation below Fs/2, thus killing whatever the (half-band) ADC did at Fs/2. Above are the fig .......
156: Digital Drive, RE: Trying to understand Apodising Filters (0.00)
Posted by Werner on 2010-09-12, 03:55:38 (91.177.203.106)
and why values other than zero would mangle things using this method) They don't quite mangle, but they would modify the net frequency response in a way that likely is undesirable and thus has to be .......
157: Digital Drive, RE: Partially disagree (0.00)
Posted by Werner on 2010-09-12, 02:50:12 (91.177.203.106)
In the most general sense of having a certain function, and desiring to retain only a part of it, around a central area that seems to be of particular interest, with zero values outside of that area. .......
158: Vinyl Asylum, very similar to 80s Realistic (0.00)
Posted by Werner on 2010-09-12, 02:23:40 (91.177.203.106)
.. .......
159: Digital Drive, RE: Just got this reply from a Meridian dealer re apodising in the Sooloos system (0.00)
Posted by Werner on 2010-09-12, 01:56:15 (91.177.203.106)
Whether a DAC filter can effectively remove ADC ringing in reality, without significantly blunting frequency response, remains to be seen. It has been seen. Most 44.1kHz ADCs (and most sample rate c .......
160: Digital Drive, RE: Partially disagree (0.00)
Posted by Werner on 2010-09-12, 01:36:29 (91.177.203.106)
Apodising is windowing. It doesn't discuss phase. And yes, while for CD you can only suppress pre-ringing by using a minimum phase filter that reaches zero before Fs/2, this is not a requirement an .......
161: Digital Drive, RE: Trying to understand Apodising Filters (0.00)
Posted by Werner on 2010-09-12, 01:17:16 (91.177.203.106)
Who says an arbitrary value needs to be "stuffed" in the first place? Just generate the new sample, and write the calculated value to it. You don't need to "stuff" anything. Todd, the 'just generate .......
162: Digital Drive, RE: Black Art caused by Sony Philips failure (0.00)
Posted by Werner on 2010-09-11, 08:39:28 (91.177.216.114)
Had they done so, then they would have defined the ideal analog output corresponding to any particular sequence of PCM samples. Tony, this is nonsense. The ideal has been known since the late ninete .......
163: Digital Drive, Actually, not. (0.00)
Posted by Werner on 2010-09-11, 02:05:01 (91.177.216.114)
The bulk of the anti-alias filtering in the bulk of existing ADCs is digital. .......
164: Digital Drive, RE: Confusion is Right........... (0.00)
Posted by Werner on 2010-09-11, 02:03:17 (91.177.216.114)
The following statement is wrong: There cannot be digital filtering without oversampling. The following statement is (mostly) correct: There cannot be digital filtering without oversampling if the .......
165: Digital Drive, RE: Thanks for that (0.00)
Posted by Werner on 2010-09-10, 10:12:59 (91.177.108.59)
This contradicts your comment about the "DAC chips' innate oversampling" It doesn't. Look into how DAC chip internal filters are built and you'll see. Oversampling should not be implemented a *seco .......
166: Digital Drive, RE: Some definitions (0.00)
Posted by Werner on 2010-09-10, 01:01:39 (194.78.209.104)
The meaning of the term apodisation , regardless of context, is a smooth and gradual roll-off of a magnitude, within the area of interest, and towards zero. Windowing is virtually synonymous. This is .......
167: Digital Drive, RE: Thanks Charles (0.00)
Posted by Werner on 2010-09-08, 23:19:59 (194.78.209.104)
A DAC is used in the recording process. Is filtering applied here or is all filtering left to be invoked at the reproducing end? In other words do records have ringing nasties already there that cann .......
168: Digital Drive, RE: Thanks for that (0.00)
Posted by Werner on 2010-09-08, 23:06:35 (194.78.209.104)
It is part of the digital filtering process, which itself is part of the oversampling process. Functionally these processes do not belong to a DAC, although today's DAC chips almost invariably include .......
169: Digital Drive, RE: Trying to understand Apodising Filters (0.00)
Posted by Werner on 2010-09-08, 08:38:03 (91.177.37.218)
See link. .......
170: Vinyl Asylum, RE: Post pics of your turntables (0.00)
Posted by Werner on 2010-08-29, 08:05:38 (91.177.165.204)
A Marantz 6100 I bought for a bottle of Oban, cleaned it up, new belt, brand new OM5, and then sold for 50 Euro. .......
171: Computer Audio Asylum, not that hard to say (0.00)
Posted by Werner on 2010-08-27, 23:54:21 (91.177.58.194)
As to, "can we hear below the noisefloor?" the answer is yes. How much? This is hard to say. You can hear right to the point where plain old masking occurs. For a single tone burried in white noise .......
172: Computer Audio Asylum, RE: nope-Nope (0.00)
Posted by Werner on 2010-08-27, 05:53:06 (194.78.209.104)
Would you care to give an example yourself then, with some figures (either real-world or just based on reasonable assumptions). Or are you going to deliver as much as in that other thread? ::: TOPIC:: .......
173: Computer Audio Asylum, nope (0.00)
Posted by Werner on 2010-08-26, 22:39:05 (194.78.209.104)
You are referring to this, right? Digitally-Induced Distortion often Resembles IMD In many ways, the distortion caused by digital systems is very similar to the IMD produced by early transistorized a .......
174: Vinyl Asylum, RE: Post pics of your turntables (0.00)
Posted by Werner on 2010-08-25, 22:37:19 (194.78.209.104)
Michell Orbe / SME IV / Allaerts MC1b heavenly-modded Michell Gyro SE / RB-300 / MC Scheu .......
175: Vinyl Asylum, High Fidelity is one huge misunderstanding (0.00)
Posted by Werner on 2010-08-24, 22:38:17 (194.78.209.104)
That was the catchphrase of an interesting article in a local magazine over 20 years ago. It detailed why conventional stereo technology could never succeed, in a [i]consistent[/i] and [i]repeatable[/ .......
176: Vinyl Asylum, RE: Nope, that's really happening; TTs are very high distortion (0.00)
Posted by Werner on 2010-08-24, 22:26:19 (194.78.209.104)
I did the same test, playing a CD at much louder levels than usual, recording from a GyroDec 1 meter in front of a loudspeaker. The feedback sound was nearly buried in the noise floor and it was even .......
177: Digital Drive, RE: I agree, A 20+ year old CD player is just not going to cut it (0.00)
Posted by Werner on 2010-08-24, 09:09:46 (91.177.78.13)
TDA1540, one per channel. 4 x oversampling with steep digital filtering and noise shaping to eke 16 bit performance out of the 14 bit DACs. .......
178: Digital Drive, RE: Seems Surprising, But It Shouldn't Be.................. (0.00)
Posted by Werner on 2010-08-24, 00:37:08 (194.78.209.104)
Did you read the Miller article I sent you months ago? Still, I don't think RFI ingress explains the observed better sound over tape as, just as with amplifiers, intermodulation down into the audible .......
179: Vinyl Asylum, RE: GRAHAM SLEE ERA GOLD V DISAPPOINTING BASS (0.00)
Posted by Werner on 2010-08-22, 01:58:34 (91.177.99.11)
Sell it, or use the tone control on the 7800. That's what it is for. .......
180: Vinyl Asylum, RE: no pic, look here (0.00)
Posted by Werner on 2010-08-20, 11:23:01 (91.177.222.150)
You slide the arm forward. Then put the stylus, carefully, in the hole in the template. Then, carefully, roll the arm backwards until the template and arm tube line up when viewed from above. During t .......
181: Digital Drive, RE: Recognising a high quality Non-OS DAC...Part 2 (0.00)
Posted by Werner on 2010-08-20, 02:33:06 (194.78.209.104)
> I could, but what would be the point? If I wanted to publish the filter > I use I would, but I do not desire to do so. Fair enough. But just to satisfy your idiot competitor couldn't you point at on .......
182: Vinyl Asylum, no pic, look here (0.00)
Posted by Werner on 2010-08-19, 22:25:03 (194.78.209.104)
To the original poster: do you have this yes or no? .......
183: Digital Drive, RE: Recognising a high quality Non-OS DAC...Part 2 (0.00)
Posted by Werner on 2010-08-19, 04:41:20 (194.78.209.104)
Pi*f*T evaluated at the Nyquist rate gives Pi/2, or 90 degrees. But this is linear phase, constant group delay, whereas the compensating analogue filter is not. -- You may well be aware of the hordes .......
184: Digital Drive, RE: Recognising a high quality Non-OS DAC...Part 2 (0.00)
Posted by Werner on 2010-08-18, 23:15:41 (194.78.209.104)
> from a viewpoint of psychoacoustics, where it seems good evidence exists that humans do percieve (not hear, mind you) ultrasonic energy Any evidence to share? What I have seen so far was pretty weak .......
185: Computer Audio Asylum, RE: demonstruction (0.00)
Posted by Werner on 2010-08-17, 11:50:17 (91.177.11.96)
Yes, what you propose is correct but it is not called upsampling. Upsampling is the increasing of sample rate, implicitly combined with filtering. All you need to do for proper numerical housekeeping .......
186: Vinyl Asylum, RE: Gyrodec arm suggestions help? (long) (0.00)
Posted by Werner on 2010-08-15, 22:10:58 (194.78.209.104)
"The SME V or IV seemed to have all the pluses except they are designed for a non-spring suspended table and the armboard requirements might affect balance" That is not true at all. In fact SME had ac .......
187: Vinyl Asylum, RE: Can a DD table be competitive with a high mass design? (0.00)
Posted by Werner on 2010-08-13, 23:41:06 (91.177.201.136)
Couldn't resist. .......
188: Digital Drive, RE: Audio needs to be liberated from archaic coasters. (0.00)
Posted by Werner on 2010-08-13, 23:36:28 (91.177.201.136)
"Or maybe I'll just get a high speed Pipelined ADC and use simple oversampling (without digital filtering) to get additional resolution." What I proposed in writing some ten years ago. But back then I .......
189: Digital Drive, RE: Audio needs to be liberated from archaic coasters. (0.00)
Posted by Werner on 2010-08-13, 13:05:36 (91.177.80.15)
Bolloks Tony, 44.1k was chosen because it was readily compatible with video components. That gave them a head start in the production process. Some were pushing 32kHz. I hope you are aware that a form .......
190: Digital Drive, RE: Building a good NOS Dac without any digital or analogue filters (0.00)
Posted by Werner on 2010-08-13, 09:21:30 (91.177.65.106)
>This suggest from an empirical viewpoint that ALL the filters you use are wrong. Well, at the ADC side they indeed are all wrong... That Sjannon bugger left humanity with one big big problem ;-) "I p .......
191: Digital Drive, RE: Building a good NOS Dac without any digital or analogue filters (0.00)
Posted by Werner on 2010-08-13, 06:40:03 (194.78.209.104)
"Whether the output of a DAC switch is a 0 order hold or an approximation to an impulse depends" I have never seen anything else than ZOH for an audio DAC, except for the TNT Convertus Decima, which w .......
192: Digital Drive, RE: Recognising a high quality Non-OS DAC... (0.00)
Posted by Werner on 2010-08-13, 05:35:19 (194.78.209.104)
I take it the table was sourced from the various datasheets. If so, what guarantee do you have that the THD figures were obtained under identical conditions, i.e. measurement bandwidth and current out .......
193: Digital Drive, RE: Filterless DAC's and Ultrasonic Noise (0.00)
Posted by Werner on 2010-08-13, 03:16:33 (194.78.209.104)
I agree. That and perhaps the presence of large gate capacitance that, when not accounted for in design, might bring the driver stage or VAS in problems when bombed with excess HF. But this too would .......
194: Digital Drive, semantic police (0.00)
Posted by Werner on 2010-08-12, 22:20:24 (91.177.182.96)
T, if you want to T-each, please use correct terminology (despite the web being soaked in incorrect one). Aliasing is the thing at the input, sampling side. An infinite series of equidistant frequenci .......
195: Computer Audio Asylum, demonstruction (0.00)
Posted by Werner on 2010-08-12, 10:50:26 (91.177.191.77)
This is the spectrum of a 7kHz sine, captured at 44.1kHz sampling rate, 16 bits, with flat 1 bit TPDF dither. As you see this is a very clean signal, and a flat noise floor. This is what happens wh .......
196: Computer Audio Asylum, RE: Volume leveling (0.00)
Posted by Werner on 2010-08-11, 22:22:57 (91.177.160.191)
There is no resampling involved. Once you touch a 16b signal with an operator, it is 16b no more, but rather more. If you do this while on the way to a (nominally) 24b DAC then fine, since you can acc .......
197: Computer Audio Asylum, RE: "Properly"..........Issue is (0.00)
Posted by Werner on 2010-08-10, 23:46:45 (194.78.209.104)
That's why you have to validate anything you want to use. It is the same as in every other discipline. There is good stuff and there is bad stuff. But don't blame the underlying principles. But you, a .......
198: Computer Audio Asylum, RE: "Properly".......... (0.00)
Posted by Werner on 2010-08-10, 22:31:30 (81.247.153.182)
It's not rocket science (not that rocket science is that much itself), just observing the basic rules of numerical analysis, i.e. knowing what the accuracy of the machine-made calculations are and kee .......
199: Vinyl Asylum, RE: Gyro SE and SME 309 Questions. (0.00)
Posted by Werner on 2010-08-10, 10:11:00 (91.177.37.218)
In my experience Michells are rather transparent to arms and cartridges, so you could try anything that is compatible in mass and arm board availability. There have been interesting marriages with SME .......
200: Vinyl Asylum, RE: Need help with a pre... (0.00)
Posted by Werner on 2010-08-10, 10:08:02 (91.177.37.218)
DC offset is unintended direct current (as opposed to alternating current) at the output of an audio component. Such a signal is anomalous and dangerous. If it were to make its way past a power amp, t .......
201: Computer Audio Asylum, RE: Volume leveling (0.00)
Posted by Werner on 2010-08-10, 10:03:50 (91.177.37.218)
"Why does the DSP add more bits?" How many bits do you need to represent '1023'? 10. How many to represent '1023 x 1.23'? "I tried increasing the volume by 0.5dB. Still trashes the imaging. " What did .......
202: Vinyl Asylum, RE: Gyro SE and SME 309 Questions. (0.00)
Posted by Werner on 2010-08-09, 23:49:28 (194.78.209.104)
"Patience is the name of the game with this 'table." Yes. One should not forget that the design dates back to 1980, before internet stores. Back then it was explicitly meant for dealer installation, w .......
203: Computer Audio Asylum, RE: Volume leveling (0.00)
Posted by Werner on 2010-08-09, 23:40:10 (194.78.209.104)
No infringement if it were for non-public, non-commercial use or investigation. Which applies to me, probably less to you ;-) Apart from this there is of course no guarantee that the patent describes .......
204: Computer Audio Asylum, RE: Volume leveling (0.00)
Posted by Werner on 2010-08-09, 02:09:22 (194.78.209.104)
Bob Katz' patent has been published, so anyone with a DAW, and a lot of patience, can reproduce K-Stereo as a number of separate processing steps. But you won't have a handy 'preview' button. A coupl .......
205: Digital Drive, RE: "Noise Shaping" in D/A Conversion.............. (0.00)
Posted by Werner on 2010-08-08, 22:35:15 (91.177.191.17)
"The Diamond DAC contains EIGHT 24 bit DACs per module for a true 26 bit resolution. " 26? Hype ... .......
206: Vinyl Asylum, RE: Gyro SE and SME 309 Questions. (0.00)
Posted by Werner on 2010-08-08, 22:32:53 (91.177.191.17)
1- What would be the correct radius of the armrest to the record spindle? In rest the arm should point straight ahead. See picture. 2- While lowering the stylus onto the record the control lever .......
207: Computer Audio Asylum, for completeness (0.00)
Posted by Werner on 2010-08-07, 04:59:02 (91.177.201.98)
I only listened at the computer: -TerraTec Phase 26 USB -DIY headphone amp -AKG K-400 headphones No direct streaming. Files were loaded/decoded into the DAW, then played. Differences were not subtle. .......
208: Computer Audio Asylum, RE: Attention Golden Ears: Please help me compare two audio files (0.00)
Posted by Werner on 2010-08-06, 14:35:04 (91.177.121.35)
2 sounds too loud, too bright, brash, and mechanical. It is unlistenable crap. Compared to the original, there's something funny with 1 as well. .......
209: Computer Audio Asylum, RE: Amazon.com selling upsampled SACDs. (0.00)
Posted by Werner on 2010-08-05, 04:30:28 (194.78.209.104)
Well, that's not what happens ... Not now and not twenty years ago. The first stage in an audio DAC is the initial oversampling with the main reconstruction filter. Word length increases in this stage .......
210: Vinyl Asylum, Technics SL-1200: recent models have excessive cable capacitance (0.00)
Posted by Werner on 2010-08-03, 23:05:43 (194.78.209.104)
It just emerged at Vinyl Engine that recent SL-1200s (post 2008?) have a different cable, now with significantly increased capacitance: over 300pF (!). This makes matching to MM cartridges problemati .......
211: Digital Drive, RE: Sabre DAC not 32-bit? (0.00)
Posted by Werner on 2010-08-02, 23:26:09 (194.78.209.104)
T, I feel your definitions of DACs are driven predominantly by your personal aversion of noise shaping, which is not very scientific. I suggest redefining class 2) : a 32 bit DAC is a DAC whose archit .......
212: Vinyl Asylum, RE: Thanks Fretless (0.00)
Posted by Werner on 2010-07-30, 00:43:55 (91.177.210.26)
"Michell don't sell the tacho loop motor/supply as un upgrade to Gyro owners (which is interesting)" It is not interesting. It is not official policy to provide an upgrade path from Gyro to Orbe. I .......
213: Vinyl Asylum, RE: Werner - some questions (0.00)
Posted by Werner on 2010-07-30, 00:36:17 (91.177.210.26)
" by dint of its dedicated tacho loop motor/PSU. " I know this theory of yours. You know, there are also people who theorize that the tacho motor has zero benefit. "As I see it, the added mass lowers .......
214: Vinyl Asylum, RE: Any Gyro users who switched to Gorbes ? (0.00)
Posted by Werner on 2010-07-28, 23:52:21 (91.177.189.125)
Fret, I've had Gyro, Gorbe, and Orbe. Trust me, the Orbe sounded the quickest of the lot in the bass, and the Gorbe the slowest. The two-tier plinth of the Orbe works. .......
215: Vinyl Asylum, RE: Excellent explanation! (0.00)
Posted by Werner on 2010-07-23, 01:29:52 (91.177.211.20)
you asked .......
216: Vinyl Asylum, RE: I've heard it several times (0.00)
Posted by Werner on 2010-07-23, 01:20:54 (91.177.211.20)
"In short, the response of the cart itself obviates the need for RIAA compensation. " That's not entirely correct. The generator's natural response has the same tendency as the required RIAA correctio .......
217: Computer Audio Asylum, RE: Crossfader .. question remains, do they limit resolution (0.00)
Posted by Werner on 2010-06-18, 22:21:07 (91.177.186.5)
"Wasn't the promise of full-digital audio" What promise? No-one or nothing ever promised me anything. "and if it can't, well, then-- it's a convenience, best seen back in it's origins as the teenager' .......
218: Digital Drive, RE: Question about CDs purchased from the UK in the last while (0.00)
Posted by Werner on 2010-06-17, 23:01:05 (194.78.209.104)
I the last couple of years I noticed that Amazon UK CDs almost always are wrapless, and with plenty of small scars and scratches on the jewel case. In fact many CDs look a bit used to me. I stopped b .......
219: Computer Audio Asylum, RE: Crossfader .. question remains, do they limit resolution (0.00)
Posted by Werner on 2010-06-14, 22:15:36 (194.78.209.104)
Why worry? While the fade is not in progress there should be no loss. And while fading the loudest track (with the less loss) masks the distortions of the softer track (with the most loss). ::: TOPIC: .......
220: Vinyl Asylum, RE: wat u can do when your TT is running slower? (0.00)
Posted by Werner on 2010-06-07, 04:03:30 (194.78.209.104)
Can you tell us how much slower? Put a small marker on the platter, and then use a chronometer to time the duration for making exactly 100 revolutions. This should be 3 minutes exactly. .......
221: Vinyl Asylum, RE: Thanks everyone (0.00)
Posted by Werner on 2010-06-06, 02:53:22 (91.177.107.140)
"to hear the Mac Mini w/PureVinyl+iTunes through a Wavelength Brick v3 or Ayre QB-9" This chain still does not contain an ADC, unless you want to rely on the thing in the Mac Mini. What matters with r .......
222: Vinyl Asylum, RE: Ripping gurus arise (0.00)
Posted by Werner on 2010-06-06, 02:11:13 (91.177.107.140)
You don't want to connect a serious system like yours to a computer, which is ultimately a source of pollution. I used to do that myself, then gave up an invested heavily in a standalone solution. .......
223: Computer Audio Asylum, RE: comparison of 24/96 and 24/192 versions of L'histoire Du Soldat from High Def Tape Transfer (0.00)
Posted by Werner on 2010-06-03, 11:26:38 (91.177.186.130)
Ah, Sony ... the company that threatened to sue for publishing my opinion on DSD on my personal webpages. The world would be a better place without them. .......
224: Computer Audio Asylum, RE: HDTT Replacement Offer (0.00)
Posted by Werner on 2010-06-03, 11:24:18 (91.177.186.130)
Even LPs have such things ... .......
225: Computer Audio Asylum, RE: It is not easy (0.00)
Posted by Werner on 2010-06-03, 11:23:04 (91.177.186.130)
Yes, that's normal for not-unaffordable convertors using off the shelf ADC chips. All (delta-sigma) ADC chips I know of (preceeding 2009, I haven't checked since) have the rising output of their noise .......
226: Computer Audio Asylum, RE: HDTT Replacement Offer (0.00)
Posted by Werner on 2010-06-03, 06:30:49 (91.177.173.55)
"Werner said they were the result of upsampling." No. Never said that. It is all about the mirroring of the sub-24kHz spectrum about 24kHz. This can be caused by naive upsampling, or, as in this part .......
227: Computer Audio Asylum, RE: It is not easy (0.00)
Posted by Werner on 2010-06-03, 02:16:18 (91.177.173.55)
Any text on FFT and sampling theory will help. I don't know the inner workings of SPAN, so no further comment there. The image is of the first 4 seconds of the HRx Tchaikovsky track, with a 65k FFT .......
228: Computer Audio Asylum, RE: comparison of 24/96 and 24/192 versions of L'histoire Du Soldat from High Def Tape Transfer (0.00)
Posted by Werner on 2010-06-02, 22:18:33 (91.177.146.160)
That is not the issue. The issue is that the original 96kHz 'Soldat' file was created from a 48 kHz source with a, let's be lenient, defective oversampling process (it so obviously used zero stuffing .......
229: Computer Audio Asylum, RE: Some direct comparisons of Ella and Louis versions (0.00)
Posted by Werner on 2010-06-02, 11:54:47 (91.177.96.118)
"If there is significant energy at Fs/2 then there will be significant energy beyond Fs/2, and hence significant aliasing." Not necessarily. The combination of half-band with extreme steepness allows .......
230: Computer Audio Asylum, RE: It is not easy (0.00)
Posted by Werner on 2010-06-02, 07:26:23 (194.78.209.104)
The 'noise' level in your second sample is at -44dB (rms) (see readout bottom-left in SPAN). That the floor in the spectrum appears at the mythical number -96 dB is entirely coincidental and caused by .......
231: Computer Audio Asylum, RE: Question for GoldWave users.......... (0.00)
Posted by Werner on 2010-06-01, 22:54:39 (194.78.209.104)
Consult the link below. You'll see that Goldwave 5.18's sample rate convertor is horrible. .......
232: Computer Audio Asylum, RE: Some direct comparisons of Ella and Louis versions (0.00)
Posted by Werner on 2010-06-01, 22:47:15 (194.78.209.104)
"indicating that the CD probably had not had proper anti-alias filtering" Even today the majority of AA filters, be it hardware or software, still are half-band. This explains the presence of signal a .......
233: Computer Audio Asylum, Sad but true (nt) (0.00)
Posted by Werner on 2010-06-01, 00:40:13 (194.78.209.104)
.. .......
234: Computer Audio Asylum, RE: so how do you determine if a file was upsampled or not (0.00)
Posted by Werner on 2010-06-01, 00:38:42 (194.78.209.104)
I agree with Tony, see below. You want to expand the window vertically, and map a range of 120dB on it. You may also want to have a linear frequency scale, as this facilitates the recognition of repet .......
235: Vinyl Asylum, RE: on digital recordings: vinyl or CD (0.00)
Posted by Werner on 2010-05-07, 04:13:09 (194.78.209.104)
Dag Freek, "A disc cutter needs stereo line level signal put into it." Actually it needs: 1) stereo line level signal, driving the variable groove pitch controller 2) a version of 1) delayed by a some .......
236: Vinyl Asylum, RE: 30 ips master tapes (0.00)
Posted by Werner on 2010-04-29, 22:32:34 (194.78.209.104)
See link for frequency response plots of often-used multitrack and two-track tape machines at 15 and 30 ips. .......
237: Vinyl Asylum, Perhaps not (0.00)
Posted by Werner on 2010-04-24, 22:13:16 (80.200.20.96)
The third test, with the mono track, just verifies the result in the rare case of perfect channel balance. In any case will the first two tests, with the alternating channels, bring you close enough e .......
238: Vinyl Asylum, RE: Has anybody bought/used a "Fozgometer"? ... (0.00)
Posted by Werner on 2010-04-24, 07:57:38 (217.136.61.248)
"Reading the review of this device in the April "Tone Audio" magazine I am somewhat doubtful that it really will set up your azimuth optimally?" Small wonder when the review contains a glaring technic .......
239: Vinyl Asylum, you are correct (0.00)
Posted by Werner on 2010-04-21, 05:03:16 (194.78.209.104)
The influence of azimuth error angle on the mono channel balance is negligible for reasonable errors, whereas its influence on the mutual crosstalk is huge. .......
240: DVD-Audiobahn, Nope (0.00)
Posted by Werner on 2010-04-10, 22:45:03 (80.200.10.139)
It is obviously a fake, with zero musical information above 20kHz, and then a series of spuriae and images of the baseband. Keith Howard reported this in Stereophile in 2004, by re-recording the signa .......
241: Digital Drive, RE: What OpAmp should I order to replace in Music Hall CD25.2 (0.00)
Posted by Werner on 2010-04-06, 08:21:38 (217.136.31.72)
BP has slightly better figures, but the difference is irrelevant in a CD player application. .......
242: Digital Drive, RE: So what's spinning the spindle? (0.00)
Posted by Werner on 2010-04-04, 00:38:04 (217.136.32.209)
Pingsound was entirely wrong with his accusations and then tried to save his face by declaring it an April joke. .......
243: Vinyl Asylum, RE: A Tale of a Denon 103 or 304 and the Rega RB300 (0.00)
Posted by Werner on 2010-04-03, 04:41:39 (80.200.14.103)
103 in an RB300 works OKish, but is less than ideal. 304 in the same arm can be magic, if the phonostage is up to it. .......
244: Digital Drive, RE: Parasound Belted Drive RIP OFF (0.00)
Posted by Werner on 2010-04-01, 03:28:13 (194.78.209.104)
Your picture is not very clear, but I do see a rather large spindle bearing and two motors not coincident with it. Hence the disc must be spun indirectly... .......
245: DVD-Audiobahn, RE: Filter Stuff (0.00)
Posted by Werner on 2010-03-28, 04:39:53 (80.200.13.58)
You can regard the inverse of the width of the transition band as a rough measure of the impulse's width in the time domain. I.e. a short transition band (steep filter) gives rises to long ringing. Be .......
246: DVD-Audiobahn, RE: Some DVD-A not delivering Hi Def Content (0.00)
Posted by Werner on 2010-03-28, 01:41:41 (80.200.13.58)
Sinatra At The Sands contains 192kHz stereo tracks. But when re-recorded into a hi-res recorder (I have a Tascam DV-RA1000) and analysed, it appears that this was created by taking a 44.1kHz recording .......
247: DVD-Audiobahn, RE: Some DVD-A not delivering Hi Def Content (0.00)
Posted by Werner on 2010-03-28, 01:31:15 (80.200.13.58)
"a characteristic sound of a lot of digital recordings using FIR filters is a subtle chirp or pre ring?" The pre-ringing induced by the ADC's anti-aliasing filter (and not the DAC's anti-imaging filte .......
248: DVD-Audiobahn, RE: Some DVD-A not delivering Hi Def Content (0.00)
Posted by Werner on 2010-03-27, 02:23:56 (217.136.34.82)
"and a lot of audio engineers avoiding them." 99% of the available ADCs, DACs, SRCs, and SRC software is linear phase. Recently some products with minimum phase response have emerged, following Peter .......
249: DVD-Audiobahn, RE: Some DVD-A not delivering Hi Def Content (0.00)
Posted by Werner on 2010-03-26, 01:04:13 (194.78.209.104)
Not at all. Most anti-aliasing filters in ADCs and in hardware or software sample rate convertors are linear phase. Once in a digital audio workstation is it trivial to filter with linear phase. ::: T .......
250: DVD-Audiobahn, RE: Some DVD-A not delivering Hi Def Content (0.00)
Posted by Werner on 2010-03-25, 09:14:37 (91.176.49.17)
"That imposes massssssive phase shifts in the high frequencies." Not necessarilly. .......
251: Digital Drive, RE: Does ANYONE else stuff thier D/A with antistatic foam? (0.00)
Posted by Werner on 2010-03-21, 23:13:05 (194.78.209.104)
Probably much more than ten years ago, and most probably originating from Dutch journalist/engineer Peter Van Willenswaard. Another reason to be careful is that the foam can be extremely flammable, so .......
252: Vinyl Asylum, RE: Millennium Audio VTA Block (0.00)
Posted by Werner on 2010-03-21, 04:33:49 (217.136.34.221)
See link. It is also very safe. .......
253: Vinyl Asylum, RE: What exactly does a cartridges coils DCR measurements tell me? (0.00)
Posted by Werner on 2010-03-20, 06:51:47 (81.243.204.88)
"1) There is a slight imbalance; both coils should have the same DCR." Not necessarily. With some shapes of armature and windings such an imbalance is a necessary evil, but unavoidable all the same. : .......
254: Digital Drive, RE: Test results, CD vs MP3 (0.00)
Posted by Werner on 2010-03-07, 00:16:04 (81.243.198.120)
I did a similar difference test some years ago. Just for the sake of documentation here are the results, FWIW (not a lot): A single music track, from CD, properly lined up, the subtraction excuted in .......
255: Vinyl Asylum, RE: Most speed-stable belt-drive table? (0.00)
Posted by Werner on 2010-02-25, 05:51:46 (194.78.209.104)
Hi Alex, perfect speed stability implies a demodulated wow & flutter spectrogram that would be unity at 0 Hz and zero at all other frequencies. There is no belt drive system in existence that does thi .......
256: Computer Audio Asylum, RE: Look Ma, no ringing! (0.00)
Posted by Werner on 2010-02-24, 22:51:50 (194.78.209.104)
"Isn't that what the DAC is supposed to do?" It is what any oversampler is supposed to do, whether that oversampler sits in a DAC box or not. "SRC goes through all kinds of contortions trying to turn .......
257: Vinyl Asylum, RE: Can you link me the reproducing case? (0.00)
Posted by Werner on 2010-02-22, 22:27:06 (80.200.22.80)
When I arrived home yesterday I tried Audacity too. And guess: it has a correct implementation, i.e. no harmonics nor aliases. Here's a freebie beating once more an expensive pro package. Then again, .......
258: Vinyl Asylum, RE: See above, but that said... (0.00)
Posted by Werner on 2010-02-22, 04:12:55 (194.78.209.104)
"I would be pretty shocked if the quantization error would rise above the noise floor." Have you done such an experiment? I can testify that with a well-known and reputed audio editor doing a gain cha .......
259: Vinyl Asylum, RE: New Rega skeletal-plinth turntable? (0.00)
Posted by Werner on 2010-02-16, 05:49:14 (194.78.209.104)
.. .......
260: Vinyl Asylum, RE: Age means nothing (0.00)
Posted by Werner on 2010-02-14, 04:03:14 (80.201.27.213)
There are 5 GyroDec generations. There is a lot of difference between a MkI and a MkV. .......
261: Vinyl Asylum, RE: Sheu Cello or Gyrodec? (0.00)
Posted by Werner on 2010-02-14, 04:01:57 (80.201.27.213)
That makes it DC driven and up to latest spec. And there are plenty of designs for DIY upgrade supplies out there, too. But do you really want the 3009 for arm? .......
262: Vinyl Asylum, RE: Sheu Cello or Gyrodec? (0.00)
Posted by Werner on 2010-02-14, 00:07:01 (80.201.27.213)
Ask yourself this: how old is the GyroDec? One month? 25 years? .......
263: Vinyl Asylum, RE: Vinyl has 12 bit dynamic range according to Mark Waldrep (0.00)
Posted by Werner on 2010-02-11, 06:15:46 (80.200.27.92)
"Like all genuine researchers, as opposed to the charlatans passing for scientists among the "measurements are God" crowd, Bauman moves from careful observation to an attempt to understand why the num .......
264: Vinyl Asylum, RE: I don't follow some of your numbers. (0.00)
Posted by Werner on 2010-02-11, 05:54:11 (80.200.27.92)
Sorry, apparently I forgot to mention that the LP silence was compared to 16 bit digital silence with dither. .......
265: Vinyl Asylum, Not that easy (0.00)
Posted by Werner on 2010-02-11, 01:15:24 (80.200.27.92)
Dithered digital has a nice ruler flat noise density floor and a well-defined peak reference level. With analogue in general it gets a bit trickier, as the noise density is frequency-dependent both w .......
266: Vinyl Asylum, RE: Sure, but... (0.00)
Posted by Werner on 2010-02-11, 00:51:03 (80.200.27.92)
One could design a 12 bit digital channel that uses noise shaping to mimick the frequency-dependent noise floor of LP replay. Of course it would not sound exacly like a piece of gemstone dragged throu .......
267: Vinyl Asylum, RE: Part of the issue is that with analog replay you can hear into the noise floor where digital replay........... (0.00)
Posted by Werner on 2010-02-11, 00:46:37 (80.200.27.92)
" with analog replay you can hear into the noise floor where digital replay throws away everything below the least significant bit. " Digital allows exactly the same. "Now we can add noise (dither) t .......
268: Vinyl Asylum, RE: Vinyl has 12 bit dynamic range according to Mark Waldrep (0.00)
Posted by Werner on 2010-02-10, 10:56:02 (91.179.132.188)
The noise component of properly dithered digital is, and sounds like, noise. If you don't believe me then I suggest you search for the sound demoes I posted in the digital asylum a couple of months ag .......
269: Vinyl Asylum, RE: John, did you tell me before if the DL-S1 is a 103 variant? (0.00)
Posted by Werner on 2010-02-02, 03:17:50 (194.78.209.104)
The S1 is a high-compliance low-output MC that shares about nothing with the 103 family. .......
270: Vinyl Asylum, RE: Supply and demand? (0.00)
Posted by Werner on 2010-01-31, 23:35:30 (194.78.209.104)
"I think the fact that it is not their product, and that they have sourced it " It is not as simple. Michell electronics are designed and manufactured by Trichord Research, who are the people that his .......
271: Vinyl Asylum, then search for the patent (0.00)
Posted by Werner on 2010-01-30, 06:00:23 (217.136.29.145)
instead of whining. .......
272: Vinyl Asylum, RE: no but (0.00)
Posted by Werner on 2010-01-30, 04:15:25 (217.136.29.145)
The inverted bearing is bronze coloured, the old bearing is silver. As I wrote someplace else, the Papst AC is virtually indestructable (as befits AC motors). Some love and care may be all that's need .......
273: Vinyl Asylum, RE: Does anyone have experience fitting an Origin Live DC motor on a Gyrodec (0.00)
Posted by Werner on 2010-01-29, 01:38:52 (194.78.209.104)
Have you tried oiling the motor? Take off the pulley and that upper nut. Then release one or two drops of bearing oil where the axcle enters the motor body. Spin it a few times by hand. Then reassembl .......
274: Computer Audio Asylum, RE: Splitting Large High Res .WAV files (0.00)
Posted by Werner on 2010-01-27, 22:51:51 (194.78.209.104)
In Audition you set cue points, then add the song titles to the cue sheet, and let Audition stream out as separate files. No wrists are harmed in this process. .......
275: Vinyl Asylum, RE: Assuming that's a reference to the SP10 controller (0.00)
Posted by Werner on 2010-01-14, 22:57:00 (194.78.209.104)
Glad you're back in town. .......
276: Vinyl Asylum, RE: Gyrodeck vs Orbe (0.00)
Posted by Werner on 2010-01-14, 10:28:49 (87.65.62.94)
They are both very very good in their respective price classes. I have had one or two Gyrodecs in different guises over the past 14 years or so. The latest one was a loaded MkV with VC, Orbe platter, .......
277: Vinyl Asylum, RE: For anyone considering the spindle/clamp upgrade for a Gyro SE... (0.00)
Posted by Werner on 2010-01-10, 04:51:09 (217.136.42.217)
The original Michell push-down clamp worked very well with the slightly concave platter of the GyroDecs up to MkIII. Then the Gyro SE was born (and with it the GyroDec MkIV), which had a flat platter .......
278: Vinyl Asylum, RE: Ariston QDeck w/ Ortophon (0.00)
Posted by Werner on 2010-01-02, 03:00:04 (81.243.195.246)
The QDeck was a very basic model that sold for UKP150 or so at around 1988. It came standard with an OMB10. .......
279: Vinyl Asylum, RE: converting mc output into db difference? (0.00)
Posted by Werner on 2009-12-29, 04:45:26 (217.136.45.4)
20 log (0.31/0.29) = 0.58 dB .......
280: Vinyl Asylum, High Fidelity is a huge misunderstanding (0.00)
Posted by Werner on 2009-12-08, 01:06:14 (194.78.209.104)
That was the catchphrase of an interesting article in a local magazine over 20 years ago. It detailed why conventional stereo technology could never succeed, in a consistent and repeatable way, in ei .......
281: Computer Audio Asylum, Don't worry (0.00)
Posted by Werner on 2009-12-08, 00:46:33 (194.78.209.104)
It is a welcome break from trying to educate Todd in the many but very short idle moments I have while working, which, curiously, involves quite some 2's complement numbers. I'd still love to see the .......
282: Computer Audio Asylum, RE: Heuristic Interpolation Update (0.00)
Posted by Werner on 2009-12-07, 03:39:09 (194.78.209.104)
"1) Its interpolation is based on the shape of real music, not a mathematical model that is only valid for steady-state sine waves." It seems you are still operating with a deep misunderstanding of sa .......
283: Vinyl Asylum, RE: Michell Orbe AC Motor Bit The Dust (0.00)
Posted by Werner on 2009-12-04, 08:08:21 (194.78.209.104)
Trichord made the controller, but you'll need Michell for servicing the motor. You may want to repost your query at www.vinylengine.com. More good people over there. .......
284: Vinyl Asylum, RE: Michell Orbe AC Motor Bit The Dust (0.00)
Posted by Werner on 2009-12-03, 23:22:43 (194.78.209.104)
Are you positive the AC motor is really dead? Mine once burned out and John Michell fixed it for peanuts. And if the controller is the culprit then that one too should be fairly easy to fix, ask Trich .......
285: Vinyl Asylum, RE: Replacements for Philips/Impex motor? nt (0.00)
Posted by Werner on 2009-12-02, 22:56:56 (80.200.18.22)
The ubiquitous Philips/Airpax/Impax motor is still ubiquitous, be it then under the name of its new owner, Premotec: http://www.mclennan.co.uk/product/acsynchronousmotors.html You may need some assis .......
286: Digital Drive, RE: Hi rez music and upsampling? (0.00)
Posted by Werner on 2009-11-29, 22:34:18 (80.200.21.192)
"Analog filtering alone should work perfectly fine here." That is sort of corrent. And you know what? That is exactly what I wrote in an article over ten years ago, when promoting the efforts of t .......
287: Digital Drive, RE: Hi rez music and upsampling? (0.00)
Posted by Werner on 2009-11-29, 07:33:00 (217.136.27.245)
>What is the difference between "oversampling" and "upsampling?" None. > 128-times Such figures are misleading. That 128 probably comprises of first 8 x to allow digital low-pass filtering (reconstru .......
288: Digital Drive, RE: Hi rez music and upsampling? (0.00)
Posted by Werner on 2009-11-29, 00:52:44 (80.201.29.12)
"but high-rez playback needs digital filtering like a giraffe needs stilts............ " No. It needs digital filtering just like CD. And so it is done in just about any DAC chip one can buy. Please r .......
289: Digital Drive, RE: Hi rez music and upsampling? (0.00)
Posted by Werner on 2009-11-28, 01:55:45 (81.243.193.160)
"High-rez playback (at least 96 kHz sample rate) is done at its resident rate without any further upsampling." Nope. Most DAC chips go to 4x or 8x that, with filtering. Read just about any datasheet f .......
290: Vinyl Asylum, RE: Gyro Clamp- I hate it! (0.00)
Posted by Werner on 2009-11-22, 02:57:58 (87.66.117.180)
Originally the GyroDec platter was concave, the clamp came standard with the deck, there was no washer, and everything worked well. Then, in 1999, came the Gyro SE. To cut the entry cost the clamp was .......
291: Digital Drive, RE: Taddeo Digital Antidote II, Active (0.00)
Posted by Werner on 2009-11-08, 06:37:37 (217.136.3.133)
Its purpose was to "correct serious phase distortion in the analog output of any CD player" Since the adoption of oversampling ADCs and DACs for recording and reproducing audio, CD has been a linear .......
292: Computer Audio Asylum, RE: DACs are garbage collectors – right? (0.00)
Posted by Werner on 2009-11-03, 00:45:46 (194.78.209.104)
I've decided to create an audio company that will make and sell cleansamplers that insert 7 zeroes between every two input samples. That is the only way to guarantee a constant level of quality. The f .......
293: Propeller Head Plaza, RE: What is missing in measurements? In this case, not much (0.00)
Posted by Werner on 2009-11-02, 02:42:19 (194.78.209.104)
"The raw signal on the CD is inherently rolled off due to modulation." That is somewhat of a misrepresentation. The signal on the CD, i.e. the sequence of sample values, is not rolled off. But it come .......
294: Vinyl Asylum, RE: Part2.. (0.00)
Posted by Werner on 2009-11-01, 23:01:36 (194.78.209.104)
Hard to see due to the camera motion, but yes, that bounce seems to be quite decent. .......
295: Vinyl Asylum, RE: Question for you Vinyl Gurus on Speed Accuracy (0.00)
Posted by Werner on 2009-10-28, 23:26:22 (194.78.209.104)
Warp and disc excentricity cause this. When I was developing my motor controller the lack of quality in modern test records drove me nuts. .......
296: Digital Drive, RE: When you get bored... (0.00)
Posted by Werner on 2009-10-24, 06:24:55 (217.136.13.225)
"...try making a demo comparing truncation versus rounding. I think the difference will be interesting." I have a hunch such a demo would disappoint you. I also have a hunch why you prefer simple roun .......
297: Computer Audio Asylum, RE: Care to explain? (nt) (0.00)
Posted by Werner on 2009-10-24, 00:57:01 (217.136.5.5)
Tony must be the patron saint of patience, and you, Sir, don't understand the very basics of sampled signal theory (*). I suggest you try to read and understand Shannon's proof, but I'm not holding my .......
298: Computer Audio Asylum, sigh ... (nt) (0.00)
Posted by Werner on 2009-10-19, 22:00:08 (194.78.209.104)
.. .......
299: Computer Audio Asylum, RE: Ringing is a guaranteed outcome with correct upsampling for any given transient (0.00)
Posted by Werner on 2009-10-19, 02:57:30 (194.78.209.104)
.. .......
300: Computer Audio Asylum, RE: Ringing is a guaranteed outcome with correct upsampling for any given transient (0.00)
Posted by Werner on 2009-10-19, 00:48:11 (194.78.209.104)
Please read again what I wrote. And read it thoroughly this time. .......
301: Vinyl Asylum, RE: tantalum caps too (0.00)
Posted by Werner on 2009-10-18, 08:10:56 (217.136.19.134)
Tantalums do have more distortion than most aluminium electrolytics, are less resistant to overvoltage, and short when stressed, as opposed to blowing open. To be avoided. But appearances can be decei .......
302: Computer Audio Asylum, RE: Ringing is a guaranteed outcome with correct upsampling for any given transient (0.00)
Posted by Werner on 2009-10-18, 01:56:42 (80.201.18.151)
"Ringing (aka Gibbs phenomenon) will be produced when we upsample correctly." I may be counter-intuitive, but correctly oversampling (i.e. with a Sinc function) a correctly-bandlimited signal will *no .......
303: Computer Audio Asylum, a typo? (0.00)
Posted by Werner on 2009-10-18, 01:36:19 (80.201.18.151)
"On recordings made with linear phase filters that do not alias there will be no preringing." Such recordings would pre-ring indeed. Surely you meant: On recordings made with minimum phase filters tha .......
304: Vinyl Asylum, RE: Graham Slee. Less is more! I am shocked. - - pics (0.00)
Posted by Werner on 2009-10-18, 01:26:53 (80.201.18.151)
"This one is worth reverse engineering for a DIYer with time on his hands." Someone at diyaudio.com did this years ago on an earlier version. I can't find the original thread over there, but you se .......
305: Vinyl Asylum, RE: Graham Slee. Less is more! I am shocked. - - pics (0.00)
Posted by Werner on 2009-10-18, 01:22:07 (80.201.18.151)
Actually the original Era Gold I got to review in 2001 was hardwired on perfboard. With the review in progress I critiqued this, and the sound, and as a result Graham developed further, sending .......
306: Digital Drive, RE: Nuts~ (0.00)
Posted by Werner on 2009-10-17, 05:28:16 (217.136.32.123)
"Just because ... the digital filter is not a transistor does not mean their designers could skip that day in Physics class, and get away with it." Actually you don't need any understanding of QPh, n .......
307: Vinyl Asylum, more than everything (0.00)
Posted by Werner on 2009-10-17, 00:52:04 (87.66.105.166)
got revealed in this megathread ... .......
308: Digital Drive, for the sake of completeness (0.00)
Posted by Werner on 2009-10-15, 23:26:58 (194.78.209.104)
The Marantz CD7 had an intermediate-phase filter. This was 1998. I don't know the exact cut-off frequency, but from the low-order can be deduced that it only attenuates ADC pre-ringing with a little b .......
309: Vinyl Asylum, ClickRepair (0.00)
Posted by Werner on 2009-10-15, 02:06:50 (194.78.209.104)
Having tried many others, this is the one I bought: it is amazingly transparent and allows a semi-automatic mode that has you declick an LP side in 10 minutes. The author also has some other goodies f .......
310: Digital Drive, RE: WOW!!! (0.00)
Posted by Werner on 2009-10-14, 21:57:59 (194.78.209.104)
I think Charles was speaking comparatively. Of course the noiseshaped version has hiss that is clearly audible. But it is high-pitched and it is still at a much much lower level than the wideband roar .......
311: Digital Drive, RE: WOW!!! (0.00)
Posted by Werner on 2009-10-14, 21:52:14 (194.78.209.104)
Truncation. This was done in DAW software that doesn't allow full control of what's happening down below. For rounding I'd have to run it through SciLab or Matlab. I don't agree with your assessment o .......
312: Digital Drive, RE: About TAS (0.00)
Posted by Werner on 2009-10-14, 07:37:49 (194.78.209.104)
The graph is misleading because it does not include the ADC's pre- and post-ringing, which is only for a small part removed by the OVS3 filter. Further, OVS3 is a very low order filter that passes a l .......
313: Digital Drive, RE: Good question--perhaps one of the tech gurus will answer this for us? (0.00)
Posted by Werner on 2009-10-13, 22:49:42 (194.78.209.104)
"we can have one of these guys clarify this for us and whether either the Ayre or PS Audio players with their apodizing filter can do this too. " In short: a player removes the ADC-introduced pre-ring .......
314: Digital Drive, Drums, solo (0.00)
Posted by Werner on 2009-10-13, 11:47:57 (217.136.49.62)
See links. These are exactly at the equivalent of 5 bits. .......
315: Digital Drive, RE: About TAS (0.00)
Posted by Werner on 2009-10-13, 05:26:59 (194.78.209.104)
Yeah. Right. "OVS 3 (reiner Bezier-Interpolator) Dieses Verfahren liefert eine perfekte Rekonstruktion des ursprnglichen Musiksignals. Es weist keinerlei Vor- oder Nachschwinger auf und ist frei von .......
316: Digital Drive, how about this then (0.00)
Posted by Werner on 2009-10-11, 23:47:01 (194.78.209.104)
"The link looks impressive" 'looks'? So you didn't listen? How about this: 1) take a structured signal (a sine, or music), quantise it (which is a pretty structured operation). The result will have .......
317: Digital Drive, RE: Apodizing filter--Is Meridian the only one? (0.00)
Posted by Werner on 2009-10-11, 23:37:18 (194.78.209.104)
Rip CDs. Take SoX, Isotope, or possibly one or two other resampling packages, and oversample the CD tracks to 88.2k or 176.4k with apodising MP filtering like the Meridian's (and try Ayre's recipe too .......
318: Digital Drive, Thanks. Picture of lab gear included. (0.00)
Posted by Werner on 2009-10-11, 23:28:27 (194.78.209.104)
"The female vocalist used is about as close to sustained test tones as you can get in modern music " Thanks. I'll tell her she's close to a lab case. I initially picked this excerpt as, of all commerc .......
319: Digital Drive, RE: Well, here's the rub (0.00)
Posted by Werner on 2009-10-11, 01:24:17 (87.66.127.239)
"how the ear-brain operates and does it integrate over time like our lovely test equipment?" A couple of weeks ago I published a rough demo of what dither actually does to music. I built a system a sy .......
320: Digital Drive, quantisation distortion, visualised (0.00)
Posted by Werner on 2009-10-08, 01:48:49 (194.78.209.104)
.. .......
321: Digital Drive, RE: "The Big Bang Theory"................ (0.00)
Posted by Werner on 2009-10-08, 00:46:39 (194.78.209.104)
You have trouble understanding this? BTW, when asked for directions I only ever mention Heisenberg. For some reason I always have to mention him. .......
322: Digital Drive, RE: Yep, sort of. (0.00)
Posted by Werner on 2009-10-08, 00:30:18 (194.78.209.104)
Hi Charles, do you happen to know the nature of the two anti-alias filters? .......
323: Digital Drive, RE: Cannot Be Implemented............... (0.00)
Posted by Werner on 2009-10-07, 23:07:30 (194.78.209.104)
""Dither" is an "encoding" of noise at the LSB level, to help recover information that would otherwise be totally lost below the LSB." A more accurate description is: dither(*) is noise of sufficientl .......
324: Vinyl Asylum, RE: Dual CS5000 shipping clips on feet? (0.00)
Posted by Werner on 2009-10-06, 01:31:30 (194.78.209.104)
Not shipping clips. They allow two different tunings of the suspension, that's all. .......
325: Vinyl Asylum, RE: Makes sense (0.00)
Posted by Werner on 2009-10-05, 00:44:12 (194.78.209.104)
"The "usual" common wisdom is that flutter audibility falls dramatically after 10hz, " Not sure. Have a look at scrape flutter in tape decks. "Could you link to your measurements? " Nope, sorry. I don .......
326: Vinyl Asylum, RE: Good stuff John. Now, the million dollar question is... (0.00)
Posted by Werner on 2009-10-04, 23:14:01 (194.78.209.104)
FWIW, when I measured and compared the W&F spectrogram from an SL-1200 to a belt-drive TT (GyroDec and Orbe), I found the Technics to be superior below 10Hz, and inferior above that frequency, with a .......
327: Vinyl Asylum, RE: What has been your turntable evolution? (0.00)
Posted by Werner on 2009-10-03, 01:19:22 (87.66.127.214)
ITT ST-20 music centre - turntable lifted out and floating on its springs on a dedicated support. Made it look like an Oracle. Dual CS5000/Ortofon OM20 Dual CS5000/Denon DL301 - sweet Linn Axis/Akito/ .......
328: Vinyl Asylum, RE: Dual CS5000 with Ortofon AS-212S / 2M Balck (0.00)
Posted by Werner on 2009-09-27, 02:46:32 (217.136.46.230)
Well done. I've seen a CS-5000 with Rega arm before, but this modification tops that. I used to have a 5000 myself. Sounded very sweet, although too polite, with a Denon DL-301. Later replaced it wit .......
329: Vinyl Asylum, RE: MG-1 on a Gyro SE (0.00)
Posted by Werner on 2009-09-26, 08:53:58 (80.200.19.151)
The summed mass of tonearm and arm board must be 1 kg on a Gyro. .......
330: Vinyl Asylum, RE: And some of the rooms filled with sulphur hexafluoride. (0.00)
Posted by Werner on 2009-09-26, 01:01:07 (81.240.66.210)
Right. Although, once you figure in the ratio of the speed of sound in solids to the typical dimensions of a turntable, I'm afraid my nice analogy breaks. .......
331: Vinyl Asylum, RE: The absolute best way to improve the resonance performance of your turntable is.... (0.00)
Posted by Werner on 2009-09-25, 00:55:36 (194.78.209.104)
Actually the airborne vibrational input to a turntable is fairly low. I measured it on a GyroDec less than one meter in front of a speaker playing at a level that exceeds my normal listening level, an .......
332: Vinyl Asylum, RE: Also, 29KHz tape bias can be found on some LP's... (0.00)
Posted by Werner on 2009-09-23, 23:17:11 (194.78.209.104)
Or flyback from a monitor. Many older recordings contain NTSC or PAL whine. Newer ones can have anything from 15kHz upwards, depending on the type of computer CRTs in the studio. Thank goodness for LC .......
333: Vinyl Asylum, RE: Also, 29KHz tape bias can be found on some LP's... (0.00)
Posted by Werner on 2009-09-23, 07:42:32 (81.240.77.182)
But 29k is conspicuously low for tape deck bias. .......
334: Vinyl Asylum, RE: Highest frequency presnt on LPs? (0.00)
Posted by Werner on 2009-09-23, 07:10:50 (81.240.77.182)
Actually LP is a pretty treble-unfriendly medium. Here are a number of issues to ponder: 1) Cutter HF response is not very extended. The best seems to be the (rare) Ortofon DSS731, -5dB at 30kHz. The .......
335: Computer Audio Asylum, RE: Whilst I don't fully understand how SRD works, here's what I see (0.00)
Posted by Werner on 2009-09-21, 10:54:30 (81.242.207.245)
You are playing with words. "the goal of a 2x resampler is to transform the input file into what it would have been had it been recorded at twice the sample rate." What you describe above is clairvoya .......
336: Computer Audio Asylum, RE: Whilst I don't fully understand how SRD works, here's what I see (0.00)
Posted by Werner on 2009-09-21, 07:32:52 (194.78.209.104)
Again, SRCs do not intend to do that. It's a bit like dismissing a car because it doesn't fly very well. .......
337: Computer Audio Asylum, RE: Whilst I don't fully understand how SRD works, here's what I see (0.00)
Posted by Werner on 2009-09-20, 22:10:25 (194.78.209.104)
"doesn't mean it’s more accurate in creating an output file that closely approximates what the input file would have been had it been recorded at twice the sample rate." But then that is not the inten .......
338: Digital Drive, RE: Why do you keep confusing yourself? (0.00)
Posted by Werner on 2009-09-19, 22:46:46 (80.200.10.61)
"therefore Peter Craven is wrong in that an apodizing filter eliminates ringing from the ADC." Well, the proof that he is right is trivial. But you have to quote the circumstances exaxtly as required: .......
339: Digital Drive, RE: 88 KHz sample rates? (0.00)
Posted by Werner on 2009-09-19, 06:27:07 (81.242.205.69)
1) You don't want to be at the mercy of the anti-aliasing filters built in the available ADC chips 2) There are overwhelming reasons to do production work at a much higher resolution than the delivery .......
340: Digital Drive, RE: My heads spinning. Sounds like double talk marketing speak... (0.00)
Posted by Werner on 2009-09-19, 05:07:24 (81.242.205.69)
I'd like to ask Charlie H. (and others who believe the same) why you "What's wrong with a zero distortion and zero noise (recording) format, to start with ?" Nothing. "Then, if you examine your audio .......
341: Digital Drive, RE: An amazingly lucid description for laymen! (0.00)
Posted by Werner on 2009-09-17, 23:15:12 (81.245.35.241)
"listeners incapable of any emotional involvement " Do you know about the BBC's procedures for subjective evaluation? They train the listeners on particular programme material until their emotional re .......
342: Computer Audio Asylum, RE: Heuristic interpolation (0.00)
Posted by Werner on 2009-09-17, 04:14:10 (194.78.209.104)
When can we have a look at the impulse responses for the upsampling and the downsampling case? .......
343: Digital Drive, RE: The potential of different recording formats (0.00)
Posted by Werner on 2009-09-16, 22:22:32 (194.78.209.104)
"2. Early digital (80's) done in 16/44. I can't see any upwards potential, because it was captured in a 'limited' 16/44. Any real potential for this in the hirez world?" Actually there is a small pote .......
344: Digital Drive, RE: An amazingly lucid description for laymen! (0.00)
Posted by Werner on 2009-09-16, 22:11:08 (194.78.209.104)
"reason why I think that the hypothesized ringing on the recording that the apodizing filter is supposed to eliminate is a good theory, but not really what is happening." There are broadly four types .......
345: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 09:54:00 (80.200.12.242)
"I would just like to be able to explain to people why players with the MP filter sound better. " I don't think anyone can explain that. .......
346: Vinyl Asylum, RE: Help for a cartridge : MC, high compliance, low cost (0.00)
Posted by Werner on 2009-09-15, 02:30:36 (194.78.209.104)
Denon DL-304 and 301MkII AT OC-9 .......
347: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 02:15:54 (194.78.209.104)
So now we have a number of fancy DAC filter styles, but none of these do something about the ADC's embedded pre-ringing. Enter then Meridian, who brought Craven's apodising ideas to CD and who also we .......
348: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 01:55:29 (194.78.209.104)
Back to DACs and their anti-imaging reconstruction filters. In the late 80s first Wadia and then many others opted for slower filters: -cut-off: at or below Fs/2 -slope: slow, audible treble losses be .......
349: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 01:42:34 (194.78.209.104)
Let's have a first look at the replay side: The theoretically ideal DAC anti-imaging (aka reconstruction) filter is defined as the Sinc(t) function. It is characterised as: -cut-off: at Fs/2 -slope: i .......
350: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 00:55:24 (194.78.209.104)
Digital anti-alias (ADC) and anti-imaging (DAC) filters can broadly be characterised by 1) cut-off point 2) slope 3) phase ----- The cut-off frequency can be: a) below Fs/2: e.g. at 20kHz instead of 2 .......
351: Digital Drive, RE: Charles Hansen Please Explain (0.00)
Posted by Werner on 2009-09-15, 00:42:54 (194.78.209.104)
Where to start ... First this: the term 'apodising filter' is not really defined. It was adopted some 5 years ago from astronomics by Peter Craven who needed a name for a anti-aliasing (ADC) or anti-i .......
352: Vinyl Asylum, RE: 3 cents... (0.00)
Posted by Werner on 2009-09-13, 05:33:28 (81.247.177.56)
"Sampling rates during transfers should be measured in Ghz. " Of course not. Nothing wrong with 96k or 88.2k when well done. GHz for audio is ever so slightly ... absurd. .......
353: Vinyl Asylum, Grado Statement series: 60 uH (0.00)
Posted by Werner on 2009-09-11, 03:18:34 (194.78.209.104)
I know their blurb specs 2mH, but it is wrong. I measured 60uH, and experienced it as the cartridge's output remains flat into loads as low as 20 Ohms. .......
354: Digital Drive, RE: Two different questions (0.00)
Posted by Werner on 2009-09-09, 23:51:06 (194.78.209.104)
"Pre-ringing *is* happening - ask anyone involved with audio playback design." Please read carefully what I wrote. I did not tell you that pre-ringing is not happening. I told you, when it happens, wh .......
355: Digital Drive, RE: Two different questions (0.00)
Posted by Werner on 2009-09-09, 22:24:39 (194.78.209.104)
"The playback artifact of pre-ringing. " If you read and fully understand Shannon's theorem, then it will become clear that, given a correctly-bandlimited signal, a correctly-implemented playback chai .......
356: Vinyl Asylum, RE: Thanks everyone! Very helpful as usual... Another Question - - (0.00)
Posted by Werner on 2009-09-09, 22:06:58 (194.78.209.104)
"And it probably doesn't make sense to pay "megabucks" for a cartridge on my stock $500 Technics SL1200mkII anyway." Try a Benz Glider or ACE for a very pleasant surprise. "I have read that the Shure .......
357: Digital Drive, RE: Two different questions (0.00)
Posted by Werner on 2009-09-09, 21:15:15 (80.200.17.92)
> No-one can say (for certain) that "ringing" occurs at a properly-filtered ADC For starters, what constitutes 'proper filtering' for an ADC, in the context of a 44.1kHz system. I don't know. Do you? .......
358: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-09, 04:38:49 (194.78.209.104)
Ah, now I see. You do not understand the term "continuous spectrum", confusing it with "continuous signal" or "periodic signal". A continuous spectrum is a spectrum that does not consist of separate, .......
359: Vinyl Asylum, RE: MM vs MC Cartridges... newbie questions (0.00)
Posted by Werner on 2009-09-09, 03:16:11 (194.78.209.104)
Conceptually neither system (or its derivatives) has to be inferior, though market forces in the late 70s dictated that MC = high-end and the result of that history is that there haven't been much att .......
360: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-08, 09:45:45 (80.201.26.93)
Get real. Both are continuous. But what do you mean with "This is also a non-periodic signal and yet a FFT spectrum is easily obtainable"? One can do an FFT on any signal. .......
361: Vinyl Asylum, RE: Ortofon MC Hifi Cartridges (0.00)
Posted by Werner on 2009-09-07, 21:13:56 (217.136.47.204)
FYI in the July issue HFN tested a handful of MCs, including compliance. I don't have the magazine here, but the resonance measurements can be downloaded at Paul Miller's site. Audio Technica AT-OC9M .......
362: Vinyl Asylum, RE: Michell Gyro SE. (0.00)
Posted by Werner on 2009-09-06, 21:14:41 (217.136.63.10)
Dorian, Benz ACE and Glider, some of the Dynavectors, ... As for versions: see link. "While these are no official denominations, one can still distinguish more or less five GyroDec generations : * M .......
363: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-06, 12:16:20 (217.136.38.137)
Yes, we all know that (I hope). And your point is? .......
364: Propeller Head Plaza, samples (0.00)
Posted by Werner on 2009-09-05, 02:23:36 (81.240.73.61)
A xylophone is a tuned instrument. It operates by resonance in the metal bits, which implies sufficient sustain. I don't have recordings to show, but from the remains of my boys' xylophone I est .......
365: Propeller Head Plaza, RE: Fourier Analysis is NOT Requisite In the Discussion of Fundamentals and Harmonics in Music............... (0.00)
Posted by Werner on 2009-09-05, 01:20:48 (81.240.73.61)
"If one plucks a string on a guitar, it is *not* periodic because the intensity of the waveform is variable. But there is a distinct pitch. You're contending that this would *not* qualify as a fundame .......
366: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-05, 01:04:43 (81.240.73.61)
Interesting. Could you please show me how to get a discrete spectrum from a non-periodic single-event signal? .......
367: Propeller Head Plaza, RE: Fourier Analysis is NOT Requisite In the Discussion of Fundamentals and Harmonics in Music............... (0.00)
Posted by Werner on 2009-09-05, 00:57:08 (81.240.73.61)
"Whenever I see a suggestion to "look up" something, it's an admission of not being able to explain the subject matter," There is an alternative explanation. I don't have the time nor the inclination .......
368: Vinyl Asylum, RE: Gyro vs Orbe sound (0.00)
Posted by Werner on 2009-09-04, 03:25:34 (194.78.209.104)
Not lean. Leaner than an Orbe-plattered Gyro. Why? Beats me. .......
369: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-03, 23:22:23 (194.78.209.104)
Todd, you only have harmonics with a periodic signal. This is only ever approached with instruments that have significant sustain. Once the note's attack is over and the sound is in sustain, the signa .......
370: Vinyl Asylum, RE: Gyro vs Orbe sound (0.00)
Posted by Werner on 2009-09-03, 22:17:42 (194.78.209.104)
"the Orbe's three-Gyro-platters-glued-together approach" For the record, the Orbe's platter has been monolithic since 2007 or so. No more glueing. Further, my brand-new Orbe sounds quicker and leaner .......
371: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-03, 22:09:01 (194.78.209.104)
What's the fundamental of a click? Please have a look at the Fourier transform, and its implications. Can you imagine something like a continuous spectrum? .......
372: Propeller Head Plaza, RE: "Instruments Without Harmonics?" (0.00)
Posted by Werner on 2009-09-03, 10:26:15 (81.240.21.218)
"If an instrument didn't produce harmonics, it would only be producing a fundamental sine " That is not correct. The term 'harmonic' only denotes the spectral components that are integer multiples of .......
373: Digital Drive, RE: No. (0.00)
Posted by Werner on 2009-09-03, 07:57:42 (81.240.21.218)
None whatsoever. But the sad truth is, you don't quarrel with American laywers, not even when you're right. Apart from which, there was always the chance that my/our then-startup company would have t .......
374: Propeller Head Plaza, Err ???? (0.00)
Posted by Werner on 2009-09-03, 02:52:01 (194.78.209.104)
Care to explain? .......
375: Digital Drive, RE: No. (0.00)
Posted by Werner on 2009-09-02, 10:39:05 (81.242.201.219)
"After all, it's totally different to Delta Sigma isn't it...." LOL .......
376: Vinyl Asylum, RE: Advantages mono cartridge? (0.00)
Posted by Werner on 2009-09-02, 03:20:58 (194.78.209.104)
John is largely correct. At the first sight there is no difference between a cartridge that electrically responds to lateral (in-phase, mid) and vertical (out of phase, side) excitation followed by ca .......
377: Digital Drive, RE: No. (0.00)
Posted by Werner on 2009-09-02, 01:01:22 (194.78.209.104)
"If the groups hadn't split," Yes, that is the core of the drama. And the other drama is that Sony chose a format invented for archiving analogue tapes that was totally unsuited for modern-day music p .......
378: Propeller Head Plaza, RE: It's old news (2005) - but I live in the woods... Tests confirm hearing above 22 kHz. (0.00)
Posted by Werner on 2009-09-01, 03:37:01 (194.78.209.104)
It is not a secret that children exhibit response out to 25kHz or so. The 20kHz limit is an average for young adults. And generally females perform better than males. Now check the paper's listers: 4 .......
379: Digital Drive, RE: Naim's first DAC... (0.00)
Posted by Werner on 2009-09-01, 03:11:06 (194.78.209.104)
"And with all the hype of apodizing filters it would have been nice to have these as well." The digital filter is minimum phase (heck, even IIR!), but as far as I can see in Naim's blurb there isn't a .......
380: Vinyl Asylum, RE: Teragaki turntables (0.00)
Posted by Werner on 2009-08-31, 22:21:55 (194.78.209.104)
Fine that his site has a gallery now. Follow the link below for an article that appeared in 1996 in la Nouvelle Revue du Son. You have to register to access it. .......
381: Vinyl Asylum, RE: Spraypainting a turntable? (0.00)
Posted by Werner on 2009-08-27, 22:59:29 (194.78.209.104)
I did this two years ago with a very very old silver GyroDec that I was converting into something else. The original light-grey and marred subchassis was brought to a car painter and sprayed dark-g .......
382: Amp/Preamp Asylum, RE: Is my Krell FPB 600c fully Class A or not? (0.00)
Posted by Werner on 2009-08-26, 22:58:51 (194.78.209.104)
"then the amp bias and signal level are very close" That is not corrent. The bias tracks the long-term peaks in the signal. A crash in the music ups the bias, and then that plateau is held for a reaso .......
383: Amp/Preamp Asylum, RE: Is my Krell FPB 600c fully Class A or not? (0.00)
Posted by Werner on 2009-08-26, 12:01:30 (81.240.78.185)
Let me elaborate. 2300W of push-pull class A power into 2 Ohms amount to a standing current of 24 Ampere. At the same time the amplifier is rated at 600W into 8 Ohms, requiring supply rails of at leas .......
384: Amp/Preamp Asylum, RE: Is my Krell FPB 600c fully Class A or not? (0.00)
Posted by Werner on 2009-08-26, 11:37:38 (81.240.78.185)
"I have always been under the impression that it operated in Class A all the way to its maximum output of 2400 w/ch @ 2 ohms." That most certainly not. The implications for cooling ... It might be, on .......
385: Vinyl Asylum, RE: Alright then (0.00)
Posted by Werner on 2009-08-25, 23:02:28 (194.78.209.104)
Thanks. No. It's an earthquake / overexcited-toddler detector. Yes. My wife used to play it ages ago, and clarinet too. In reality the room isn't that great looking (sounding!), mostly because of its .......
386: Vinyl Asylum, Yes you are. (0.00)
Posted by Werner on 2009-08-25, 11:51:37 (217.136.59.176)
A Dorian ... OK. But a Skala??? .......
387: Vinyl Asylum, Alright then (0.00)
Posted by Werner on 2009-08-25, 11:43:32 (217.136.59.176)
Living room is 4 x 8 meters, venting through a non-wall into another 4 x 8 m space, the kitchen. .......
388: Vinyl Asylum, RE: Need setup guidance. Shelter 901, SME 309, Michell Gyro........problems, problems, problems................. (0.00)
Posted by Werner on 2009-08-23, 22:46:42 (194.78.209.104)
I agree. When I tested the Shelter 501 in my SME IV on a GyroDec it sounded warm, with not a hint of brightness or aggression. Further, engaging the damping with a decent MC cartridge tends to make th .......
389: Computer Audio Asylum, RE: LOL (0.00)
Posted by Werner on 2009-08-17, 00:36:03 (194.78.209.104)
"Werner is among those who seem authoritatively to argue that 44.1 KHz, 16-bit recordings are all we need. " No no and no! I am among the bunch of people who refute Kunchur's claim that his experiment .......
390: Computer Audio Asylum, RE: Minimum Phase Filter in Software (0.00)
Posted by Werner on 2009-08-16, 23:56:05 (194.78.209.104)
1) near-every DAC has internal oversampling, whether Tony pushes the buttons or not 2) Tony specifies a minimum phase filter that attains a lot of suppression at 22.05kHz, whereas near-all DACs, recor .......
391: Computer Audio Asylum, RE: LOL (0.00)
Posted by Werner on 2009-08-16, 11:24:54 (81.243.192.26)
"But Werner, who went largely unchallenged, earlier argued that 16-bit, 44.1 KHz sampling is capable of resolving the finest nuances the human ear can detect" I did not claim that! Better learn to rea .......
392: Vinyl Asylum, actually ... (0.00)
Posted by Werner on 2009-08-11, 22:32:43 (194.78.209.104)
If you're a little handy there is just enough space on the back panel to drill and mount two floating RCA sockets, wired to the internal XLR contacts. That allows you to use the balanced input with fl .......
393: Vinyl Asylum, Trigon Vanguard II (0.00)
Posted by Werner on 2009-08-11, 22:29:46 (194.78.209.104)
I reviewed an earlier incarnation for TNT, see link. .......
394: Vinyl Asylum, Trichord Dino and Diablo for MC, less so for MM (0.00)
Posted by Werner on 2009-08-11, 22:27:18 (194.78.209.104)
Variable gain and resistance, but just one fixed C setting. .......
395: Computer Audio Asylum, RE: Better duck under that desk; (0.00)
Posted by Werner on 2009-08-10, 06:50:25 (80.201.19.14)
Oh, Kunchur agrees: "details of the fuzzy merger do indeed depend on N: if the star images are moved closer together, the digital data of the sampled image will be different as long as the image shift .......
396: Computer Audio Asylum, RE: Which subsonic filter to use in Adobe Audition 3? (0.00)
Posted by Werner on 2009-08-07, 00:12:55 (194.78.209.104)
"Use as little filtering and impose as little phase shift as possible. " If you use a minimum phase filter (like scientific), then reverse the music file, and run again throught the MP filter, and rev .......
397: Computer Audio Asylum, RE: Better duck under that desk; (0.00)
Posted by Werner on 2009-08-05, 23:19:23 (194.78.209.104)
"Unfortunately, I cannot translate that into the “μsecs” on which Kunchur bases his argument" The (theoretical) temporal resolution of a 16-bit 44.1kHz sampled system is 22us/2^16 = 346 picosecon .......
398: Vinyl Asylum, RE: Graham 2.2 or SME V for Gyro? (0.00)
Posted by Werner on 2009-08-05, 22:37:39 (194.78.209.104)
"Michell uses SME arms when building their tables (or at least did when designing the Gyro) " That's more than a bit amazing, since the GyroDec predates the SME V with a couple of years ;-) John Miche .......
399: Computer Audio Asylum, RE: Better duck under that desk; (0.00)
Posted by Werner on 2009-08-04, 04:13:36 (194.78.209.104)
"to say unequivocally whether the changes Kuncher has detected can or can't be resolved by 44.1 KHz sampling." Yes, they can be resolved. The theoretical limit on the time resolution of a sampled quan .......
400: Digital Drive, see it as a brick in the wall ... (0.00)
Posted by Werner on 2009-08-02, 11:42:59 (217.136.60.217)
potentially, that is. Progress strides at best, it doesn't jump. .......
401: Computer Audio Asylum, RE: Better duck under that desk; (0.00)
Posted by Werner on 2009-08-02, 06:48:18 (217.136.36.32)
"Kuchner demonstrated that humans can detect differences in percepts that cannot be resolved by 44.1 KHz recordings." Please go back to the Kunchur papers. He did NOT demonstrate that. He demonstrated .......
402: Digital Drive, RE: Arrows Theorem (0.00)
Posted by Werner on 2009-08-02, 03:37:42 (217.136.36.32)
Tony, my post was just sarcasm. .......
403: Computer Audio Asylum, RE: Better duck under that desk; (0.00)
Posted by Werner on 2009-07-31, 22:46:23 (81.245.37.129)
Actually the Meyer/Moran work was heavily critised by objectivists, too. But obviously for different reasons ;-) .......
404: Computer Audio Asylum, RE: 44.1 kHz shown scientifically to be inadequate (0.00)
Posted by Werner on 2009-07-30, 09:53:13 (80.201.31.41)
"Had Kunchur used a test frequency of 7351 Hz instead of 7000 Hz then he would have conclusively proven that" Then again, the very outcome of the experiments might have been different. But IMO the exp .......
405: Computer Audio Asylum, RE: 44.1 kHz shown scientifically to be inadequate (0.00)
Posted by Werner on 2009-07-30, 04:09:24 (194.78.209.104)
"Again, you seem to be complaining of possible ambiguities in a text aimed at a lay audience rather than examining the experiments themselves. The latter strikes me as a more fruitful route" I have be .......
406: Computer Audio Asylum, another interesting test (0.00)
Posted by Werner on 2009-07-29, 22:45:55 (194.78.209.104)
Did you use MP twice? You may want to try this: 1) downsample with the MP configuration used before (but keep 24 or 32 bit resolution, please) 2) oversample with a steeper and linear phase filter, wit .......
407: Computer Audio Asylum, RE: 44.1 kHz shown scientifically to be inadequate (0.00)
Posted by Werner on 2009-07-29, 22:40:02 (194.78.209.104)
I just want to see the link between the experiments that have been done, and the aural relevance of two sharp pulses spaced 5us apart. That is a valid question. .......
408: Vinyl Asylum, RE: Thanks, everyone. Gyro SE it is! Anyone familiar with its model history? Fretless? (0.00)
Posted by Werner on 2009-07-29, 14:09:11 (217.136.38.108)
If HR, then DC, so MkII. Orbe platter makes it ugly, but if you like that ... Re-oil the bearing (Mobil One 0-W-40 will do), and get a brand new belt. There weren't a lot of TecnoArms made before the .......
409: Computer Audio Asylum, RE: 44.1 kHz shown scientifically to be inadequate (0.00)
Posted by Werner on 2009-07-29, 13:04:49 (217.136.38.108)
"For CD, the sampling period is 1/44100 ~ 23 microseconds and the Nyquist frequency fN for this is 22.05 kHz. Frequencies above fN must be removed by anti-alias/low-pass filtering to avoid aliasing. W .......
410: Digital Drive, RE: I do!... (0.00)
Posted by Werner on 2009-07-29, 11:57:27 (217.136.38.108)
Interesting. Accuphase have the best designers and make the best sounding products. When you make your own equipment, it either outperforms Accuphase's, or it doesn't. In the first case that places yo .......
411: Computer Audio Asylum, RE: Digitally boosting level - possible? (0.00)
Posted by Werner on 2009-07-29, 08:29:05 (194.78.209.104)
If you want I can do this for you as cleanly as I can. Just convey the files to my e-mail at http://www.tnt-audio.com/whoe.html with a suitable service. .......
412: Computer Audio Asylum, RE: 44.1 kHz shown scientifically to be inadequate (0.00)
Posted by Werner on 2009-07-29, 07:44:51 (194.78.209.104)
Let's repeat in short what the experiments *actually* were: 1) two vertically-arrayed tweeters are fed a 7kHz squarewave. The upper tweeter is kept aligned with the lower one (sound A) or moved backwa .......
413: Propeller Head Plaza, RE: Somebody do the math (0.00)
Posted by Werner on 2009-07-27, 23:41:41 (194.78.209.104)
"the ringing to a degree "synthesizes" the HF...." Still don't understand anti-aliasing, sampling, and reconstruction? The ringing fills in the gaps *exactly* as they were before the sampling was done .......
414: Digital Drive, RE: Well, that explains it! (0.00)
Posted by Werner on 2009-07-26, 22:51:02 (217.136.47.243)
You had the Mission DAD7000 claiming something like this in 1984 or so, although it beats me how they did that with just a single TDA1540 per channel. Perhaps a series of discrete S/Hs. And then you h .......
415: Vinyl Asylum, RE: SL-1200 questions. (0.00)
Posted by Werner on 2009-07-24, 06:10:08 (194.78.209.104)
.. .......
416: Digital Drive, phase response similar to that of a certain UK-made player (0.00)
Posted by Werner on 2009-07-21, 07:16:03 (80.200.14.249)
This is the phase versus frequency response that likely matches that of a certain UK-made player with MP filter. I can't claim that it *is* the player's response, as I've had no access to the devic .......
417: Vinyl Asylum, RE: Anyone Using Adobe Audition For Recording Vinyl? (0.00)
Posted by Werner on 2009-07-20, 00:28:52 (80.201.19.224)
For sample rate conversion the free SoX is better than Audition, if used properly. But Audition is more than good enough for starters, and still better than most freebies and even pro-level tools. .......
418: Vinyl Asylum, RE: Anyone Using Adobe Audition For Recording Vinyl? (0.00)
Posted by Werner on 2009-07-19, 10:05:25 (217.136.58.31)
Audition is very decent. Until recently its sample rate conversion was even among state of the art. One thing is important: in Settings / Data, you have to disable 'Dither Transform Results'. ::: TO .......
419: Digital Drive, RE: Good musical CD player? (0.00)
Posted by Werner on 2009-07-17, 02:17:46 (217.136.62.152)
"SONY playstation as a ... It is also a non over-sampling device." How that??? .......
420: Digital Drive, to put it bluntly (0.00)
Posted by Werner on 2009-07-17, 01:31:35 (217.136.62.152)
In a complete 44.1kHz signal chain (performance to replay), you have the choice between: -pre-ringing at around 20-22kHz -phase distortion above 10kHz -any mix of both And this with or without a droop .......
421: Digital Drive, RE: 20-bit processing (0.00)
Posted by Werner on 2009-07-17, 01:21:17 (217.136.62.152)
Tony, true 24 bit performance over the audio range, at room temperature, is virtually impossible due to thermal noise. Present-day's top-class ADCs perform at 22-23 bits at the very best, which is rat .......
422: Digital Drive, RE: I think you need some new glasses. (0.00)
Posted by Werner on 2009-07-16, 10:50:41 (81.245.47.254)
These blurbs look, to me, like big nets full of red herrings. .......
423: Digital Drive, RE: No, there are others. (0.00)
Posted by Werner on 2009-07-15, 02:53:13 (194.78.209.104)
The pre-ringing has nothing to do with pre-emphasis. Pre-emphasis for CD is a particular form of equalisation to be done during recording, and undone upon playback. It serves no useful purpose anymor .......
424: Digital Drive, RE: Not Really........... (0.00)
Posted by Werner on 2009-07-14, 23:09:14 (194.78.209.104)
"Noise shaping was simply dither with a "frequency shaped" noise signal. (As opposed to plain white noise.) No big deal." Nope. You are thinking of shaped dither. Noise shaping is something a tad mor .......
425: Digital Drive, RE: Werner, you already know this stuff. (0.00)
Posted by Werner on 2009-07-13, 07:00:39 (194.78.209.104)
"In the case of a classic "sinc" filter, the waveform would look very similar to this scope plot. " Of course. CoolEdit's *display* routine itself uses a Sinc function to plot a continuous line betwee .......
426: Digital Drive, RE: Werner, you already know this stuff. (0.00)
Posted by Werner on 2009-07-13, 03:18:56 (194.78.209.104)
"The function programmed into a digital filter defining its impulse response has a ringing characteristic." Yes. And the impulse response pre-rings, sure. But this does not mean that the recorded sign .......
427: Computer Audio Asylum, RE: Tried Adobe Audition 3.01 offline upsampling - pretty good. (0.00)
Posted by Werner on 2009-07-12, 06:25:20 (81.242.204.8)
Amazing. The more so since, as far as I can see, Audition's SRC hasn't changed since release 1.5 and thus its postfilter option still suffers from numerical problems that cause the output signal noise .......
428: Digital Drive, RE: Todd, I know you are still learning about this stuff.... (0.00)
Posted by Werner on 2009-07-12, 04:44:23 (81.242.204.8)
"you need to have a reconstruction filter on the playback side. If you don't, you WILL NOT be able to re-construct the original signal" Charles, there are plenty of DIY non-oversampled and totally unf .......
429: Digital Drive, not so Big misconception (0.00)
Posted by Werner on 2009-07-09, 00:22:44 (194.78.209.104)
Actually phase distortion is a common term in the literature. It stems from phase shift belonging to the family of linear distortions. But I agree that in the population of audiophiles with its less t .......
430: Digital Drive, RE: to Messrs. Redmond and Hansen (0.00)
Posted by Werner on 2009-07-07, 23:40:32 (194.78.209.104)
"If Redbook weren't the standard, we wouldn't have to make silly compromises. If 192 kHz were the standard, you wouldn't even need filters." That's exactly what I wrote in articles more than 10 years .......
431: Digital Drive, and to end Wadia-style (0.00)
Posted by Werner on 2009-07-07, 11:07:13 (81.242.204.145)
This is a rougher approximation, as I don't have Wadia or Legato Linear filter coefficients around here. But you'll get the idea. .......
432: Digital Drive, all linear phase now ... (0.00)
Posted by Werner on 2009-07-07, 10:45:00 (81.242.204.145)
Should speak for themselves. .......
433: Digital Drive, RE: now that's a nice trick (0.00)
Posted by Werner on 2009-07-07, 00:32:03 (194.78.209.104)
There was no desired output, no deconvolution. Let's turn this around. What sort of functions / filters would you like me to try? Have a go at it. You don't have to pay me. I have been planning an ar .......
434: Digital Drive, now that's a nice trick (0.00)
Posted by Werner on 2009-07-06, 23:42:36 (194.78.209.104)
you knowing what I know or do not know. I would be impressed if you were correct. But you aren't. The oversamplig filter I used is a textbook linear phase half-band brickwall filter with a number of t .......
435: Digital Drive, RE: to Messrs. Redmond and Hansen (0.00)
Posted by Werner on 2009-07-06, 23:36:07 (194.78.209.104)
"But the one on page 4 sounds better. " And there is no arguing with that. But it would be nice to know why it sounds better, and given its response to a signal that has passed through an LP half-band .......
436: Digital Drive, RE: Nice Trick........ (0.00)
Posted by Werner on 2009-07-06, 22:29:31 (80.200.27.217)
Todd, I did not look for such a thing. But it is of course your prerogative to remain clueless. .......
437: Vinyl Asylum, Roscoe did that ages ago ;-) (0.00)
Posted by Werner on 2009-07-06, 10:52:09 (217.136.59.109)
.. .......
438: Digital Drive, RE: Theory vs. Real World........ (0.00)
Posted by Werner on 2009-07-06, 10:42:55 (217.136.59.109)
"The non-presence of pre-ringing with a linear-phase filter is impossible...." Ah, Todd, you still haven't read and understood Shannon's proof, right? Actually I wanted to waste this evening' .......
439: Digital Drive, to Messrs. Redmond and Hansen (0.00)
Posted by Werner on 2009-07-06, 00:31:11 (194.78.209.104)
The use of non-oversampling or of a minimum phase oversampling filter is not a guarantee for the absence of pre-ringing. Neither is the presence of a linear-phase oversampling reconstruction filter a .......
440: Digital Drive, RE: What is wrong with digital-TAS Meridian CD & Speaker reviews (0.00)
Posted by Werner on 2009-07-05, 01:10:24 (80.200.17.213)
"You don't need to spend $16,000 to eliminate the pre-echo if this is what he is refering to" Many claim they do, but AFAIK only the Meridian today does. There are free software solutions that can do .......
441: Computer Audio Asylum, RE: All Upsampling is Software...... (0.00)
Posted by Werner on 2009-06-29, 23:23:32 (194.78.209.104)
Methinks this one would suffice ... .......
442: Computer Audio Asylum, RE: All Upsampling is Software...... (0.00)
Posted by Werner on 2009-06-29, 10:46:02 (80.200.30.230)
1) design the filter itself, i.e. find the coefficients 2) allocate a bunch of multipliers and adders, depending on the area/power budget 3) assign operations to specific instances of mults and adds 4 .......
443: Computer Audio Asylum, RE: All Upsampling is Software...... (0.00)
Posted by Werner on 2009-06-28, 23:13:23 (194.78.209.104)
Trust me, you can do this with pure hardware, and most chips are just that. .......
444: Digital Drive, RE: Why are the new hirez downloads dvd only? (0.00)
Posted by Werner on 2009-06-16, 22:51:30 (87.66.26.122)
DVD-A is dead, DVD-V is not. So it makes sense to release on DVD-V. I can author both formats, but when I write an audio DVD for myself it is DVD-V too. .......
445: Vinyl Asylum, RE: analog (0.00)
Posted by Werner on 2009-06-16, 08:41:03 (80.200.9.233)
Ah, yes. One part of the chain. Cartridges get above 20kHz, that is true. How they finally drop off remains to be seen, as in order to measure that reliably you'll need a wide band stimulus signal. An .......
446: Vinyl Asylum, RE: you are refering to digital, vinyl is not digital (0.00)
Posted by Werner on 2009-06-15, 23:04:53 (87.66.26.122)
"there is no "filter" in analog, it just slowly goes away in the higher fequencies" Oh boy. Not in this universe ... You may want to sit down and measure the impulse response of a tape deck. And then, .......
447: Vinyl Asylum, RE: Entirely wrong - NOT (0.00)
Posted by Werner on 2009-06-14, 10:23:12 (81.244.209.248)
I'm sorry, Sir, but even though Mr.Kelly's phrasing was a bit unlucky, you display a fundamental lack of understanding of things mathemagical and signal theoretical. .......
448: Vinyl Asylum, RE: The theorem states that all the information in the original waveform below a certain frequency can be captured (0.00)
Posted by Werner on 2009-06-12, 11:22:04 (81.245.33.93)
"it still deals with sampling. In audio that means digital. " Nope. There exist analogue sampled systems, and yes, these are sometimes used in audio. .......
449: Vinyl Asylum, RE: Not correct (0.00)
Posted by Werner on 2009-06-12, 11:21:07 (81.245.33.93)
"and to get those frequencies back out correctly requires an oversampling DAC. " *of course* it requires that. That is the only way of getting to the required reconstructor. .......
450: Vinyl Asylum, RE: Not correct (0.00)
Posted by Werner on 2009-06-12, 07:55:23 (87.66.26.122)
"If you sample 49.99KHz at 100KHz, you get a flat line that rises and falls slowly as you shift your phase orientation with the sine wave (or, an erroneous low-frequency signal)." This is wrong. If th .......
451: Vinyl Asylum, RE: wasn't that for a steady state sound wave (0.00)
Posted by Werner on 2009-06-12, 07:51:42 (87.66.26.122)
The theorem is not, emphatically not, limited to steady state signals such as sines. .......
452: Vinyl Asylum, RE: Quadraphonic albums might be an interesting study. (0.00)
Posted by Werner on 2009-06-12, 07:49:38 (87.66.26.122)
That's cheating because the quad records were cut at half speed (hence that Ortofon with 25kHz response: it was specifically made for 50kHz response half speed cutting for quad). Half speed cutting br .......
453: Vinyl Asylum, RE: Yes, possibly. But in mysterious ways... (0.00)
Posted by Werner on 2009-06-12, 03:28:46 (87.66.26.122)
"I would think that the closer a reproduction is to the master tape or the master file, the better we would like the reproduction in our home systems." What mechanism guarantees that what is on the ma .......
454: Vinyl Asylum, RE: That accords well (0.00)
Posted by Werner on 2009-06-12, 02:41:08 (87.66.26.122)
"well known that signals below the noise floor can still be perceived." Signals can easily be heard below the integrated noise of an LP, but not below the noise density of the LP at the frequency of i .......
455: Vinyl Asylum, RE: No, it is not. (0.00)
Posted by Werner on 2009-06-11, 23:27:38 (87.66.26.122)
Hi Mark, there is one Ortofon cutter, not too often used, that reaches out to 25kHz on a good day. The ubiquitous Neumann SX74 allegedly drops stone dead above 22kHz. SX68 fares worse. After LP manufa .......
456: Vinyl Asylum, RE: Is vinyl a "hi res" format? (0.00)
Posted by Werner on 2009-06-11, 23:11:48 (87.66.26.122)
"I did not know that DSD has so great pulse response. " I don't believe that graph. Must have been doctored. DSD as on SACD is roughly equivalent to an analogue channel with ~100kHz bandwidth. That im .......
457: Vinyl Asylum, RE: Is vinyl a "hi res" format? (0.00)
Posted by Werner on 2009-06-11, 23:09:43 (87.66.26.122)
"Kusunoki Ryhei said that the puls response of a typical CD player is so poor it would have been" Kusunoki was dead wrong in that particular article of his, showing an interesting lack of understandi .......
458: Vinyl Asylum, finally (0.00)
Posted by Werner on 2009-06-11, 23:03:22 (87.66.26.122)
Here is, finally, someone who hints at understanding the single main issue with audio as we know and experience it. For many years now I have been pondering whether I should write an article about jus .......
459: Propeller Head Plaza, RE: "Bits of resolution" (0.00)
Posted by Werner on 2009-06-11, 02:37:31 (87.66.26.122)
Show me a cutter head that goes above 50kHz. Show me one that goes above 25kHz. I know exactly one that does it. And it is not the Neumann ... bring bac k dynamic range .......
460: Propeller Head Plaza, RE: "Bits of resolution" (0.00)
Posted by Werner on 2009-06-11, 02:33:04 (87.66.26.122)
"But with analog, the signal can be heard well **below** the noise floor." No, it cannot. A signal can be heard below the integrated noise over the bandwidth of interest. Which is NOT the noise floor. .......
461: Digital Drive, RE: Well then, it's obviously not a dynamic range meter... (0.00)
Posted by Werner on 2009-06-10, 23:19:39 (87.66.26.122)
"Their "DR" designation is misleading and erroneous." Not "their". This re-definition of DR has been in use in the recording and mastering community for many decades, so if "they" would now come up wi .......
462: Vinyl Asylum, RE: Just how good is a Technics tonearm? (0.00)
Posted by Werner on 2009-06-09, 22:52:10 (87.66.26.122)
"These graphs show why. The Technics arm is as linear as you can make a tonearm." A swept- or noise-based frequency response measurement is not going to tell you anything about possible differences be .......
463: Vinyl Asylum, RE: Orbe versions (0.00)
Posted by Werner on 2009-05-25, 23:49:39 (87.66.26.122)
ORBE (SE) GENERATIONS * Orbe MkI: pre-1999 * Orbe MkI.1: January 1999-Summer 2001, split suspension turrets as per the Gyro SE * Orbe MkII: Summer 2001, Papst AC motor and QC drive replaced with .......
464: Digital Drive, RE: Is anyone using this stuff inside your DACs? (0.00)
Posted by Werner on 2009-05-07, 23:17:39 (87.66.26.122)
You know the ESD protective foam pinned ICs (used to) come in? That is a black open-cell foam, millimeters thick, that is conductive yet has a significant resistance (kOhms or so). In the early nineti .......
465: Vinyl Asylum, RE: Archiving LP collection to Digital (0.00)
Posted by Werner on 2009-05-06, 23:26:24 (87.66.26.122)
I use a Tascam DV-RA1000 DVD recorder at 96kHz or 88.2kHz. Files are then edited on a PC with Adobe Audition. Sample rate conversion is done with SoX. Sometimes I use homebrew equalisation. A major we .......
466: Vinyl Asylum, RE: Interesting + well researched: surprising how the IEC (0.00)
Posted by Werner on 2009-04-26, 00:24:32 (81.245.32.147)
"how many record pressing companies" Hopefully none at all, since the IEC amendment is aimed at the replay side only. bring bac k dynamic range .......
467: Digital Drive, RE: Differences between 3 filters on new DacMagic....your impressions? (0.00)
Posted by Werner on 2009-04-25, 07:36:21 (81.247.96.123)
They are all steep. The filters labelled Linear and Minimum are respectively linear phase and minimum phase half-band (yuk!) filters of equal steepness. The filter labelled Steep is a linear phase fi .......
468: Vinyl Asylum, review of the similar 3-decimal Canrong (0.00)
Posted by Werner on 2009-04-22, 03:20:45 (87.66.26.122)
Plus another thing you may want to read: http://www.tnt-audio.com/sorgenti/in_balance_e.html bring bac k dynamic range .......
469: Digital Drive, RE: nope (more than one bit off topic) (0.00)
Posted by Werner on 2009-04-22, 00:38:31 (87.66.26.122)
Let me see. Making digital chips is my profession. I've got stuff of mine orbiting Mars, and other stuff waiting to land on Mars. I've owned and sold a successful semiconductor company. I've risen in .......
470: Digital Drive, nope (0.00)
Posted by Werner on 2009-04-21, 01:41:40 (87.66.26.122)
Suppose you have a DAC with true 20 bit performance and a 20 bit input format. CD's 16 bit words are input left-aligned, meaning that a 16 bit full scale word is mapped onto the DAC's 20 bit full scal .......
471: Computer Audio Asylum, RE: SoundForge EQ tests (0.00)
Posted by Werner on 2009-04-20, 23:09:17 (87.66.26.122)
Smooth it will be. But as you experienced most software equalisers are based on their analogue counterparts. In practise these digital versions are generated from analogue transfer functions by the bi .......
472: Computer Audio Asylum, RE: not at all about sucking bits and papers (0.00)
Posted by Werner on 2009-04-20, 11:21:34 (81.245.53.27)
The gain changes not, but the EQ potentially yes. Remember that in a sampled signal space Fs/2 (the unit circle) is equivalent to infinity. And the further the EQ algorithms can operate from this freq .......
473: Computer Audio Asylum, not at all about sucking bits and papers (0.00)
Posted by Werner on 2009-04-20, 10:30:27 (81.245.53.27)
> But no one has given an adequate explanation of how a minimum phase > anti-imaging filter can eliminate preringing that is on an original > recording unless it also rolls off the highs. AFAIK no-one .......
474: Computer Audio Asylum, RE: HDTracks Free Downloads (0.00)
Posted by Werner on 2009-04-19, 23:18:40 (87.66.26.122)
"It can also be converted from an unfiltered 44.1 master, which will also show bandwidth beyond 22 kHz" Yes, but that would be obvious in the spectrum. If you want to see a dog's breakfast have a look .......
475: Computer Audio Asylum, RE: HDTracks Free Downloads (0.00)
Posted by Werner on 2009-04-19, 07:18:07 (81.245.220.207)
"I would call into question the origin of the material." It originates from 88.2, 96, or higher. It has been tampered with, see the very deep nulls near 48kHz, even on the one with the noise shaper p .......
476: Computer Audio Asylum, RE: HDTracks Free Downloads (0.00)
Posted by Werner on 2009-04-19, 04:55:51 (81.245.220.207)
Link below. "said that they are 'proofs' of the 96k origin. Well, maybe." 1) Pray read what I wrote. 2) Would you care to elaborate on the 'maybe' thing? As in giving possible scenarios for obtaining .......
477: Computer Audio Asylum, spectral plots (0.00)
Posted by Werner on 2009-04-19, 00:44:25 (81.245.220.207)
FWIW the free sampler is all genuine hi-res material, no resampling from lower resolution stuff. This is obvious from a cursory glance at it with a spectrum analyser. This is not to say that .......
478: Vinyl Asylum, DIY (0.00)
Posted by Werner on 2009-04-18, 05:02:25 (81.245.196.205)
.. bring bac k dynamic range .......
479: Computer Audio Asylum, RE: 32 bit floating point sucks.-good paper (0.00)
Posted by Werner on 2009-04-17, 22:51:48 (81.245.196.205)
"This is why I call these filters "fancy tone controls". It is up to the mastering engineer to use the proper filters for a given recording" Don't agree. There exists now a legacy of 20 years of recor .......
480: Computer Audio Asylum, you didn't answer the question (nt) (0.00)
Posted by Werner on 2009-04-17, 07:08:25 (87.66.26.122)
.. bring bac k dynamic range .......
481: Computer Audio Asylum, RE: 32 bit floating point sucks.-good paper (0.00)
Posted by Werner on 2009-04-16, 23:58:27 (87.66.26.122)
Since you don't reply to my question I'll do it myself. When up/oversampling the reconstruction filter, be it digital, analogue, or a combination, must filter at the Fs/2 of the *original* signal, not .......
482: Computer Audio Asylum, RE: 32 bit floating point sucks. (0.00)
Posted by Werner on 2009-04-16, 23:44:35 (87.66.26.122)
"Perfect filters (and this is what an aspiring SRC should approximate to a very high degree) project information into a subspace. This is about all that Shannon says about filtering signals in his cla .......
483: Computer Audio Asylum, RE: 32 bit floating point sucks. (0.00)
Posted by Werner on 2009-04-16, 12:26:54 (81.245.37.225)
"Perhaps this test is too stringent. It flunks every SRC that I have tested" Perhaps this test is wrong(*). Perhaps you should have a look at what Shannon says about anti-aliasing filters (**). No ne .......
484: Computer Audio Asylum, RE: 32 bit floating point sucks. (0.00)
Posted by Werner on 2009-04-16, 03:12:26 (87.66.26.122)
Not necessarilly. It all depends on the implementation and the nature of the processing used. The wisest is to characterise each and every processing or format conversion step in the chain before comm .......
485: Computer Audio Asylum, RE: Dither when up-sampling with Audition? (0.00)
Posted by Werner on 2009-04-16, 02:05:05 (87.66.26.122)
"prefer turning pre/post filter off. I tried that, but, I prefer using pre/post filtering, set on highest(999)" Audition's pre/post-filter has numerical issues, at least in versions 1.5 and 2. Visit t .......
486: Computer Audio Asylum, RE: 32 bit floating point sucks.-good paper (0.00)
Posted by Werner on 2009-04-16, 01:58:53 (87.66.26.122)
"Some people here are incapable of understanding the nature of upsampling, one of which is to shorten by a factor of 4 (for CD) the time span of the pre-post oscillations casued by the brick wall filt .......
487: Vinyl Asylum, Michell Alecto Stereo MkII + Quad ESL-63 (0.00)
Posted by Werner on 2009-04-15, 23:19:23 (87.66.26.122)
.. bring bac k dynamic range .......
488: Inmate Systems, Werner's home office (0.00)
Posted by Werner on 2009-04-15, 03:07:47 (87.66.26.122)
Werner 's home office System
IP Address: 87.66.26.122
Last Update: April 15, 2009 at 03:07:47
Amplifier: (see speakers)
Preamplifier (or None if Integrated): 'No Hay Banda' DIY headpho .......
489: Digital Drive, RE: Sure (0.00)
Posted by Werner on 2009-04-12, 00:25:14 (81.245.53.21)
"He (Craven) clearly spells out the idea that you suggested:" And which culminated in the Meridian 808 filter, although with a transition band only 10% wide it can hardly be called 'apodizing' anymore .......
490: Vinyl Asylum, RE: YES (0.00)
Posted by Werner on 2009-04-11, 04:15:19 (81.245.39.110)
AFAIK both are Maxons and from the way OL market their mixes of power supplies and motors their resistances are probably pretty close to each other. bring bac k dynamic range .......
491: Digital Drive, RE: Audio signals are only approximately band limited. (0.00)
Posted by Werner on 2009-04-10, 22:44:57 (81.245.39.110)
"All audio signals are of finite duration. All interesting audio signals are non-zero. From mathematics we know that the only bandlimited signal of finite duration is the zero signal." That's needless .......
492: Digital Drive, Sure (0.00)
Posted by Werner on 2009-04-10, 22:37:51 (81.245.39.110)
but only the 2003 one, where he proposes to use the band between 20 and 40kHz for a slow-rate MP rolloff. Don't know if there are any later publications? What they did in the 808 CD player IMHO is a l .......
493: Digital Drive, RE: I've since seen Stereophile's "Ringing False: Digital Audio's Ubiquitous Filter" (K.Howard, Jan. 06) (0.00)
Posted by Werner on 2009-04-10, 06:30:29 (87.66.26.122)
"recording is rarely (if ever) done at a rate as low as Redbook (44.1 kHz) but rather at higher rates presumably pre- and post-ringing is even less of an issue in the audio passband. I don't know what .......
494: Digital Drive, RE: Questions regarding Ayre's "MP filter" White Paper (0.00)
Posted by Werner on 2009-04-10, 03:56:05 (87.66.26.122)
All very funny considering that the Fs/2 ringing of a DAC reconstruction filter is part of the reconstruction process itself and thus harmless when correctly done (please read and understand Shannon's .......
495: Digital Drive, RE: There's something in common between Lavry and you, Todd. (0.00)
Posted by Werner on 2009-04-10, 03:49:44 (87.66.26.122)
"There are several that are doing 32/384, BTW." SHow me. A 32 bit DAC or ADC is as nonsensical as 66 bit, physically. bring bac k dynamic range .......
496: Digital Drive, RE: It is a strange mind which attempts to 'theorise' that lower sample rates represent the analog waveform better (0.00)
Posted by Werner on 2009-04-10, 03:46:06 (87.66.26.122)
"Why should a dacs need less, with its brick wall filter causing massive phase shifts. " The typical DAC brick wall filter has zero phase shift. bring bac k dynamic range .......
497: Vinyl Asylum, YES (0.00)
Posted by Werner on 2009-04-09, 23:44:11 (87.66.26.122)
OL used to use Premotec motors, CL29 series I believe. Since these are acoustically noisy and, contrary to some others, OL never found a cure for this, they changed over to Maxon motors a couple of ye .......
498: Vinyl Asylum, RE: DB Systems DB-8 (0.00)
Posted by Werner on 2009-04-09, 03:04:27 (87.66.26.122)
"The DB-8 specs out waaay flatter than the 640P" How that. I've seen quite a few independent frequency response measurements of the Cambridge 640P, various samples. They were all very flat. Absurdly .......
499: Vinyl Asylum, add to the statistics (0.00)
Posted by Werner on 2009-04-09, 01:16:48 (87.66.26.122)
My Gyro MkV DC is dead-quiet. My new Orbe NC2 is also totally silent. bring bac k dynamic range .......
500: Vinyl Asylum, I know the feeling ... (0.00)
Posted by Werner on 2009-04-08, 23:12:47 (87.66.26.122)
I've had a GyroDec MkV with Orbe platter and VC supply for about six years now. In 2004 I started on a major system rebuild: cartridge, amplifiers, CD source, ... everything got replaced bar the turn .......
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