Config file for a52 plugin (60-a52-encoder.conf) produces no/garbled sound via optical digital out (S/PDIF)
GitHub issues - edited
github at alsa-project.org
Tue Nov 2 10:10:04 CET 2021
alsa-project/alsa-plugins issue #38 was edited from jensgw:
Dear Maintainer,
this bug was originally reported on the debian tracker. They advised me to post it here.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=998125
* What led up to the situation?
Fresh Debian 11 install. I want to output 5.1 sound via toslink.
Used KDE settings to switch from analog output to digital out 5.1.
This produced no or garbled sound and Youtube videos would play back way to fast without sound.
Then I switched to digital out stereo, this worked as expected but only stereo.
I could trace back the error to the shipped config file for alsa's a52 plugin: 60-a52-encoder.conf.
When I replaced that file with a much simpler one (see below) 5.1 digital out worked as expected.
I tried with onboard sound (PCH9) and dedicated card (Audigy Z) with the same result, the inlcuded a52 config file does not work.
== Start a52.conf
```
pcm.a52 {
@args [CARD]
@args.CARD {
type string
}
type rate
slave {
pcm {
type a52
bitrate 448
channels 6
card $CARD
}
rate 48000
}
}
```
== End a52.conf
Therefore I assume the shipped config file with debian has an error somewhere. Please fix this.
Best reagards
Jens
-- System Information:
Debian Release: 11.1
Architecture: amd64 (x86_64)
Kernel: Linux 5.14.0-0.bpo.2-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages libasound2-plugins depends on:
ii libasound2 1.2.4-1.1
ii libavcodec-extra58 [libavcodec58] 7:4.3.2-0+deb11u2
ii libavresample4 7:4.3.2-0+deb11u2
ii libavutil56 7:4.3.2-0+deb11u2
ii libc6 2.31-13+deb11u2
ii libjack0 [libjack-0.125] 1:0.125.0-3+b1
ii libpulse0 14.2-2
ii libsamplerate0 0.2.1+ds0-1
Issue URL : https://github.com/alsa-project/alsa-plugins/issues/38
Repository URL: https://github.com/alsa-project/alsa-plugins
More information about the Alsa-devel
mailing list