[bug#43628] Further Info

[Julien Lepiller]

Hi Prafulla,

Le 26 septembre 2020 03:31:38 GMT-04:00, Prafulla Giri 
<pratheblackdiamond@gmail.com> a écrit :
>Another information:
>
>I have other programs on my foreign system (installed via guix) that
>produce sound well, without any issues. They include:
>espeak and kdenlive.
>
>Also, I did try making the union-build use copies instead of symlinks
>using
>(union-build ... #:symlink copy-recursively) but that didn't work out
>either.
>
>Now, I'm going to take a look at fixing the pkg-config rules, and will
>be
>updating this thread should that resolve this issue.
>
>On Sat, Sep 26, 2020 at 12:21 PM Prafulla Giri
><pratheblackdiamond@gmail.com>
>wrote:
>
>> I forgot to mention, but the union-build works. If one `guix build`s
>the
>> union package, and cd into the /gnu/store/...-union-build, one will
>see
>> that things are there as it should be (lib/normal-alsa-*.so and
>> lib/alsa-lib/*pulse*.so).
>>
>> It's just that aegisub seems to be looking from the
>> /gnu/store/normal-alsa-lib-dir instead of
>/gnu/store/union-alsa-package.
>>

I think the issue with the union-build is that it is completely ignored: alsa 
doesn't look in it's current directory for plugins, but in the directory where 
it's been configured (at build time) to look for.

On the Guix System, there is a service that creates a /etc/asound.conf, which 
references alsa-plugins:pulseaudio. Maybe you actually want to configure that? 
Maybe try to copy this to a new file .asoundrc:

pcm_type.pule {
  lib "/home/foo/.guix-profile/lib/alsa-lib/libasound_module_pcm_pulse.so"
}

ctl_type.pulse {
  lib"/home/foo/.guix-profile/lib/alsa-lib/libasound_module_ctl_pulse.so"
}

pcm.!default {
  type pulse
}

ctl.!default {
  type pulse
}