RE: PiCorePlayer HD Settings

Posted by soundchekk (A) on February 24, 2022 at 08:10:55

In Reply to: RE: PiCorePlayer HD Settings posted by Cut-Throat on February 12, 2022 at 06:03:37:

This is the trackinfo, not the actual info about what goes out to the DAC, what you are talking about.

Just enable a SRC and you'll see, there's no change.

To be really sure what's going on towards that DAC you need to run

#############################################

# cat /proc/asound/card0/stream0

##############################################
(you might have to change card0 if you run more than one soundcard.)

while running a track.

That shows the low level Alsa audio layer status. The stuff that ends up in your DAC.

Here comes an output example of that command:
##############################################

iFi (by AMR) iFi (by AMR) HD USB Audio (DOP2 at usb-fe980000.usb-1.1, high spee : USB Audio

Playback:
Status: Running
Interface = 1
Altset = 1
Packet Size = 72
Momentary freq = 44099 Hz (0x5.8328)
Feedback Format = 16.16
Interface 1
Altset 1
Format: S32_LE
Channels: 2
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000, 705600, 768000
Data packet interval: 125 us
Bits: 32
Channel map: FL FR
Sync Endpoint: 0x81 (1 IN)
Sync EP Interface: 1
Sync EP Altset: 1
Implicit Feedback Mode: No

#######################################

"Momentary frequency" shows the actual sample rate. Here 44099Hz.
"Format" shows the bitdepth. Here 32bit.

16bit material usually gets zero-padded towards the DAC to fill up the required bits. In above case, pretty common nowadays, 16 zero-bits get added.

If I recall it correctly the slight variation of the sample rate
is based on the asynchronous USB traffic. Technically the PC can't
stream continuously 44100, because the DAC is the master. That's why the SR slows down or speeds up a little on the PC side.

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Follow Ups Full Thread

Topic - PiCorePlayer HD Settings - kwillisjr 05:44:12 02/12/22 (27)

OK. Next issue. - kwillisjr 19:32:01 02/21/22 (15)

Why don't you tell us what you were doing wrong on your previous problem first ............. - Cut-Throat 05:13:45 02/22/22 (14)

RE: Why don't you tell us what you were doing wrong on your previous problem first ............. - kwillisjr 10:52:06 02/22/22 (13)

I was curious .......................... - Cut-Throat 11:03:22 02/22/22 (12)

RE: I was curious .......................... - kwillisjr 15:26:19 02/22/22 (11)

RE: I was curious .......................... - Cut-Throat 16:08:36 02/22/22 (10)

RE: I was curious .......................... - kwillisjr 16:20:15 02/22/22 (9)

RE: I was curious .......................... - Cut-Throat 16:25:53 02/22/22 (8)

RE: I was curious .......................... - kwillisjr 07:56:51 02/23/22 (7)

Well, did you get the 192 kHz to play ? .................nt - Cut-Throat 06:08:06 02/24/22 (6)

RE: Well, did you get the 192 kHz to play ? .................nt - kwillisjr 12:34:31 02/24/22 (5)

RE: Well, did you get the 192 kHz to play ? .................nt - E-Stat 16:50:46 02/24/22 (2)

RE: Well, did you get the 192 kHz to play ? .................nt - kwillisjr 19:06:40 02/24/22 (1)

I've never had difficulty -nt - E-Stat 19:21:32 02/24/22 (0)

RE: Well, did you get the 192 kHz to play ? .................nt - Cut-Throat 12:35:52 02/24/22 (1)

RE: Well, did you get the 192 kHz to play ? .................nt - kwillisjr 19:00:32 02/24/22 (0)

RE: PiCorePlayer HD Settings - kwillisjr 03:55:40 02/15/22 (6)

Take a Screen shot of the ENTIRE Web Control Page ................... - Cut-Throat 04:32:45 02/15/22 (5)

RE: Take a Screen shot of the ENTIRE Web Control Page ................... - kwillisjr 19:34:27 02/15/22 (4)

Larger screenshot (hopefully) - kwillisjr 19:40:39 02/15/22 (3)

Figured it out - kwillisjr 19:45:01 02/15/22 (2)

Mine will show bitrate whether playing or not ........ - Cut-Throat 21:06:14 02/15/22 (1)

Same here -nt - E-Stat 08:30:22 02/16/22 (0)

RE: PiCorePlayer HD Settings - Cut-Throat 06:03:37 02/12/22 (3)

RE: PiCorePlayer HD Settings - soundchekk 02/24/2208:10:55 02/24/22 (0)

RE: PiCorePlayer HD Settings - mlsstl 15:06:34 02/12/22 (1)

RE: PiCorePlayer HD Settings - Cut-Throat 15:34:01 02/12/22 (0)

Follow Ups

RE: PiCorePlayer HD Settings - soundchekk 02/24/2208:10:55 02/24/22 (0)

RE: PiCorePlayer HD Settings

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