Re: Yep, and.... - PhilNYC

Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

Re: Yep, and....

Posted by PhilNYC (D) on October 21, 2004 at 05:46:55

In Reply to: Re: Yep, and.... posted by Heidi2000 on October 20, 2004 at 13:06:46:

Posts: 17

mhafner,

My understanding is this; even though a CD is "digital", an audio system is still an analog system. A CD stores "data" by burning pits into a piece of plastic...how deep and how long those pits are need to be within certain tolerances in order for the data to be read correctly, but they still can vary. For the purposes of calculation and math, this data can be manipulated without error. However, you are still dealing with analog voltages whose level and duration are determined by the length and depth of those pits on the CD. Ultimately, the voltages are converted to other voltages at the DAC via a series of resistors and transistors in the DAC...this is an analog process, and the level and duration of the input voltages makes an impact. If those levels and durations (eg. pit depth and length) were not precise, then they will be detrimental to the sound quality produced. In other words, jitter can be stored into the data stream on the CD. In this case, the CDR burner is probably not very precise, so you are hearing the jitter effects...

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Follow Ups Full Thread

Topic - CDRs vs Regular CDs - Heidi2000 11:55:03 10/20/04 (14)

Re: CDRs vs Regular CDs - nutella 19:58:54 10/22/04 (0)

Re: CDRs vs Regular CDs - Todd Krieger 21:41:22 10/21/04 (0)

Re: CDRs vs Regular CDs - Awe-d-o-file 07:17:31 10/21/04 (0)

Thanks all for your contribution. One last observation regarding store bought CDs - Heidi2000 05:37:45 10/21/04 (0)

Just as mystifyingly..... - max-greece 02:40:38 10/21/04 (0)

totally different recording process )) Re: CDRs vs Regular CDs - ruffscruff 22:11:50 10/20/04 (0)

Different types of CDR's will be better than others! - NEAR SOTA 21:36:56 10/20/04 (0)

Yep, and.... - pburant 12:37:11 10/20/04 (6)

Re: Yep, and.... - JarrettH 00:36:01 10/21/04 (0)

Re: Yep, and.... - Heidi2000 13:06:46 10/20/04 (4)

Re: Yep, and.... - PhilNYC 10/21/0405:46:55 10/21/04 (0)

Also, with computers, there is NO error correction....(nt) - Android 14:07:15 10/20/04 (1)

Where do you get that notion from?? .....(nt) - clifff 03:13:49 10/22/04 (0)

Timing is everything - pburant 13:33:50 10/20/04 (0)

Follow Ups

Re: Yep, and.... - PhilNYC 10/21/0405:46:55 10/21/04 (0)

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