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From: Leo Famulari <leo@famulari.name>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: 40832@debbugs.gnu.org
Subject: bug#40832: Audacity does not work with PulseAudio
Date: Tue, 28 Apr 2020 18:39:08 -0400	[thread overview]
Message-ID: <20200428223908.GB31840@jasmine.lan> (raw)
In-Reply-To: <87imhjs3oz.fsf@gnu.org>

On Tue, Apr 28, 2020 at 11:25:32PM +0200, Ludovic Courtès wrote:
> Could it be that the problem is in Audacity and not in alsa-lib?

I'm not 100% sure but I don't think so.

The function snd_config_hooks_call() is from alsa-lib I can't find any
way in alsa-lib for it work in this case, even though it aims to work by
default on systems with plugins in '/usr/lib/alsa-lib' or similar.

The lookup is performed in alsa-lib's 'src/dlmisc.c', by the function
snd_dlopen(), and it only looks in the hard-coded path provided by the
ALSA_PLUGIN_DIR C object macro, which ends up being alsa-lib's own store
directory.

> I can do this with mpg123:
> 
> --8<---------------cut here---------------start------------->8---
> $ cat ~/.asoundrc
> pcm.!default {
>     type pulse
> }
> $ mpg123 -o alsa …
> --8<---------------cut here---------------end--------------->8---
> 
> and the sound goes through PulseAudio.

Is that on Guix System or another distro? On Guix System, this is
handled by the service alsa-service-type.

On Debian, using mpg123 from Guix, and with your ~/.asoundrc, it fails
in the same way as Audacity:

------
% mpg123 -o alsa ...
High Performance MPEG 1.0/2.0/2.5 Audio Player for Layers 1, 2 and 3
	version 1.25.13; written and copyright by Michael Hipp and others
	free software (LGPL) without any warranty but with best wishes
ALSA lib conf.c:3683:(snd_config_hooks_call) Cannot open shared library libasound_module_conf_pulse.so (/gnu/store/nyylgcnzmbw8wrn4sna2crl0g7zxxh33-alsa-lib-1.2.2/lib/alsa-lib/libasound_module_conf_pulse.so: libasound_module_conf_pulse.so: cannot open shared object file: No such file or directory)
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM default
[src/libout123/modules/alsa.c:181] error: cannot open device default
[src/libout123/libout123.c:455] error: Found no driver out of [alsa] working with device <default>.
main: [src/mpg123.c:314] error: out123 error 3: failure loading driver module
------

  reply	other threads:[~2020-04-28 22:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-24 21:37 bug#40832: Audacity does not work with PulseAudio Leo Famulari
2020-04-24 23:15 ` Leo Famulari
2020-04-25  4:03   ` Leo Famulari
2020-04-26 20:03     ` bug#40832: alsa-lib cannot find its plugins Leo Famulari
2020-04-28 21:25   ` bug#40832: Audacity does not work with PulseAudio Ludovic Courtès
2020-04-28 22:39     ` Leo Famulari [this message]
2020-05-08 22:45       ` Leo Famulari
2020-05-09  5:24         ` Leo Famulari
2020-05-16 19:33 ` bug#40832: [PATCH 0/2] Help alsa-lib find its plugins Leo Famulari
2020-05-16 19:34   ` bug#40832: [PATCH 1/2] gnu: alsa-plugins: Add GUIX_ALSA_PLUGIN_DIRS search path specification Leo Famulari
2020-05-16 19:34   ` bug#40832: [PATCH 2/2] gnu: Help alsa-lib find its plugins on foreign distros Leo Famulari
2020-05-17 18:19   ` bug#40832: [PATCH 0/2] Help alsa-lib find its plugins Leo Famulari
2020-07-28 10:52 ` bug#40832: alsa-lib cannot " Danny Milosavljevic
2020-07-28 10:56   ` Danny Milosavljevic
2020-07-28 23:56     ` Leo Famulari
2020-07-28 23:56   ` Leo Famulari
2020-07-29 11:18     ` Danny Milosavljevic
2020-10-13 16:02   ` Leo Famulari
2021-02-01 20:51     ` Leo Famulari

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