Re: [gentoo-user] ALSA wizard...

[Mark Knecht <markknecht@gmail.com>]

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Jorge,
   Sorry for top posting. I'm at a site with limited capabilities at the
moment. Please forgive.

   I'm slightly confused by the question but before I get into that please
provide the output of

cat /proc/asound/cards
cat /proc/asound/modules

What desktop environment are you using?

What kernel are you running?

Thanks,
Mark

On Wed, Apr 22, 2020 at 2:57 PM Jorge Almeida <jjalmeida@gmail.com> wrote:

> ... desperately needed.
>
> The setup:
> -- a microphone connected to an audio interface, which connects to an
> USB port in the computer. The interface works like a USB sound card,
> at least regarding sound capture. It works: I can record my voice with
> arecord into a wav file, and then play the file with aplay.
> -- a (motherboard) sound card with a toslink output connected to an
> external DAC/amplifier. It works: playing wav, youtube, etc.
>
> The problem:
> I need to use it for voice chat. I tried slack and discord (the latter
> both via browser and app--there's a package in portage--, the former
> only via browser). No sound, neither outbound nor inbound.
> None of these programs provides a way to tell them which devices to
> use, so I assume they just go for some default.
> I don't have a .asoundrc file. Contents of /etc/alsa/conf.d/ are not
> customized.
> Maybe some ALSA wiz that happens to be familiar with discord can
> suggest something?
>
> Thanks
>
> Jorge Almeida
>
> $ cat /proc/asound/devices
>   1:        : sequencer
>   2: [ 0- 0]: digital audio playback
>   3: [ 0- 0]: digital audio capture
>   4: [ 0- 1]: digital audio playback
>   5: [ 0- 2]: digital audio capture
>   6: [ 0- 3]: digital audio playback
>   7: [ 0]   : control
>   8: [ 1- 0]: digital audio playback
>   9: [ 1- 0]: digital audio capture
>  10: [ 1]   : control
>  33:        : timer
>
> $ arecord -L
> null
>     Discard all samples (playback) or generate zero samples (capture)
> sysdefault:CARD=PCH
>     HDA Intel PCH, Generic Analog
>     Default Audio Device
> front:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     Front speakers
> usbstream:CARD=PCH
>     HDA Intel PCH
>     USB Stream Output
> sysdefault:CARD=CODEC
>     USB Audio CODEC, USB Audio
>     Default Audio Device
> front:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     Front speakers
> surround21:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> iec958:CARD=CODEC,DEV=0
>     USB Audio CODEC, USB Audio
>     IEC958 (S/PDIF) Digital Audio Output
> usbstream:CARD=CODEC
>     USB Audio CODEC
>     USB Stream Output
>
> $ aplay -L
> null
>     Discard all samples (playback) or generate zero samples (capture)
> sysdefault:CARD=PCH
>     HDA Intel PCH, Generic Analog
>     Default Audio Device
> front:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     Front speakers
> surround21:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Analog
>     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> iec958:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Digital
>     IEC958 (S/PDIF) Digital Audio Output
> hdmi:CARD=PCH,DEV=0
>     HDA Intel PCH, Generic Digital
>     HDMI Audio Output
> usbstream:CARD=PCH
>     HDA Intel PCH
>     USB Stream Output
> sysdefault:CARD=CODEC
>     USB Audio CODEC, USB Audio
>
> I know iec958:CARD=CODEC,DEV=0 is the appropriate device for capture
> and that iec958:CARD=PCH,DEV=0 is the appropriate device for playback,
> because it's what works with -D.
>
>

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