Questions tagged [alsa]
ALSA (Advanced Linux Sound Architecture ) is an API of audio functions for the linux platform.
794 questions
0 votes
1 answer
29 views
Why is the audio group missing from www-data under nginx/php-fpm?
TL;DR I am trying to make aplay play a wav file. This requires the current user to be in the audio group. It works fine when I invoke it from a logged in user, even when I su -u www-data but the nginx/...
- 111
0 votes
0 answers
346 views
Bit perfect audio on Debian 13
I am trying to install bit perfect audio. Up to and including Debian 11 that was not much of a problem. However, now I am on Debian 13 (Trixie) and Pulseaudio and Pipewire are giving me a hard time. ...
- 1
0 votes
1 answer
64 views
Playing an audio file using Procmail does not work (no audio card found)
I have a strange issue on my Debian server. I am receiving mails with Postfix and "Procmail" for the user notfall. After a mail was received, the script from Procmail should play an audio ...
- 165
0 votes
1 answer
51 views
my synth that uses ALSA has poor audio quality on SOME pcs
I've written a softsynth on kubuntu (well, it's a flatpak) that uses ALSA to render the samples. On my main pc that goes to a USB mixer it works fine. On my second pc that goes to a straight audio ...
- 111
1 vote
1 answer
192 views
View available config options (hw params) like rate and channels for an ALSA device
When I try to record from a hw ALSA device that does not support the expected parameters, it shows me which formats are available: arecord -D hw:0,0 [...] Available formats: - S16_LE - S24_LE Then I ...
- 259
1 vote
2 answers
687 views
Pipewire does not detect USB sound card found by ALSA, but it used to
I was attempting to connect to a Google Meet call on my browser (Chromium) and where it would normally have found my USB audio device (a USB dongle that I can connect a microphone and line-out/speaker ...
- 561
0 votes
1 answer
104 views
How do I play multiple different audio files to multiple different speakers using USB soundcards?
I have several 6 different audio files that I'd like to send to 6 different speakers, since I don't have a USB interface with 6 different channels, I would like to use 2 different USB soundcards along ...
- 101
1 vote
1 answer
250 views
How do the ALSA snd_pcm_hw_params_set_period_size... functions work?
There are a whole bunch of ALSA functions that start with snd_pcm_hw_params_set_period_size but I do not understand the val and dir parameters. The first two params make sense: snd_pcm_t*pcm and ...
- 121