S/PDIF / Digital Audio on OMV3

k218306 · 8. August 2017

Hey,

this is my first post in this forum so i'd like to give my best wishes to everyone reading this.

I managed to build my OMV - NAS/Server from scratch. Everything works fine except digital audio via S/PDIF.

I am using the Shairport Plugin to mimic an Airport Express, which works fairly well with analog audio, but my Asrock J3455's SPDIF port stays inactive.

Do you have any idea how to activate S/PDIF? I am using OMV3 with the jessie-backports kernel.

Here is my aplay -l

Code

root@server:~# aplay -l
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: PCH [HDA Intel PCH], Gerät 0: ALC892 Analog [ALC892 Analog]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: PCH [HDA Intel PCH], Gerät 1: ALC892 Digital [ALC892 Digital]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: PCH [HDA Intel PCH], Gerät 3: HDMI 0 [HDMI 0]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: PCH [HDA Intel PCH], Gerät 7: HDMI 1 [HDMI 1]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 0: PCH [HDA Intel PCH], Gerät 8: HDMI 2 [HDMI 2]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0

Alles anzeigen

And here comes my

Code

root@server:~# cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0x91310000 irq 377

I've added my user to the audio group, bur this does not change anything. Any Ideas?

k218306 · 8. August 2017

Kurzes Update:

I've created a system wide asound file in /etc/asound.conf with the following content according to aplay -l

Code

pcm.digital {
        type hw
        card 0
        device 1
}


ctl.digital {
        type hw
        card 0
        device 1
}

Alles anzeigen

Immediately after that, the speaker test and music streaming (Stereo) via Airplay works.

What does not is Surround - Sound...any ideas about that?

cabrio_leo · 8. August 2017

Zitat von k218306

What does not is Surround - Sound...any ideas about that?

Are you sure, that your playback source is already coded in Dolby Digital or Dolby Surround? This is the first condition.

Zitat von k218306

pcm.digital

PCM is an uncompressed audio format, like it is coded on a audio CD. DD and DS are compressed audio formats. I didn´t know you to configure it, but maybe it is necessary to make additional configuration in /etc/asound.conf for surround sound support.

The audio source must support surround sound and the audio output device must not be configured to pcm in my opinion to get surround sound from S/PDIF. If you restrict it to PCM you will get Stereo only.

cabrio_leo · 8. August 2017

Maybe this helps: A close look to ALSA, Section: ALSA and surround sound

and this: DigitalOut

ruudm · 4. Dezember 2021

Zitat von cabrio_leo

Maybe this helps: A close look to ALSA, Section: ALSA and surround sound and this: DigitalOut

Zitat von k218306

Kurzes Update

(ping) Hi, old thread, I know.... If still around, can I ask you for help in this post?

mi-hol · 4. Dezember 2021

ruudm according to your signature you are using Debian 11 aka Bullseye.

ALSA was replaced by PulseAudio in later OS versions, hence reviving a post a post for OMV3 wont help in this case.

Better to read about PulseAudio and if eventually needed to start a new thread (likely more & better responses in RPI forum though)

PI's Debian 11 aka Bullseye announcement has some comments re audio issues https://www.raspberrypi.com/ne…bullseye/#comment-1565816

ruudm · 5. Dezember 2021

Correct, my signature contains 'Pi4' but the contents of my message is 'can I ask you for help in this post?' which describes the real problem.

votdev · 5. Dezember 2021

PulseAudio is for desktops only afaik

Jetzt mitmachen!