Oh, I come from a culture that does not call seniors by their first names.
(:
Yes! guix-android looks super awesome! I'm glad that you are working on
that. You're awesome.
(Also, I just realized that you've also got guix-home-manager and so many
more cool repositories! I need to check those out, and soon!)

I did manage to resolve this issue. Kinda'. Here:
https://github.com/peanutbutterandcrackers/guix-packages/blob/master/aegisub.scm

All I had to do was re-define 'alsa-lib' to point to the /gnu/store path of
alsa-plugins. The /gnu/store path had to be figured out during runtime.

Could you please check how this fares in a GuixSD system? If it goes well,
perhaps I should send a patch in for aegisub. But then again, I wonder if I
should make the changes in alsa-lib itself, but I am not very sure about
that.

On Sat, Sep 26, 2020 at 8:20 PM Julien Lepiller <julien@lepiller.eu> wrote:

> Hehe, thanks for your interest in guix-android. It's not really done yet,
> but I'm very motivated :). It always feels weird when someone on the
> internet calls you Mr ^^. No need to be so stiff, you can call me "Julien"
> (and I suppose it's the norm to call people by their first name in this
> kind of internet community).
>
> Maybe try to run aegisub with strace -f, you might find out something. You
> may have to take a look at alsa's sources to find out how it looks for its
> plugins exactly (maybe try to grep for PLUGIN or PLUGINDIR)?
>
> Le 26 septembre 2020 08:07:34 GMT-04:00, Prafulla Giri <
> pratheblackdiamond@gmail.com> a écrit :
>>
>> Okay, I think I'm stuck now. lol
>>
>>
>>
>> On Sat, Sep 26, 2020 at 3:42 PM Prafulla Giri <
>> pratheblackdiamond@gmail.com> wrote:
>>
>>> Hello Mr. Lepiller,
>>>
>>> Thank you for the tip. For the moment, I want to poke around this issue.
>>> Perhaps I get absolutely tired of it (or find a good hack - and an ugly
>>> patch). I did manage to learn a bit more about union-builds in general. So,
>>> that's a silver lining.
>>>
>>> Also, your work on guix-android seems so very cool! Please keep up the
>>> great work!
>>>
>>> On Sat, Sep 26, 2020 at 3:28 PM Julien Lepiller <julien@lepiller.eu>
>>> wrote:
>>>
>>>>
>>>>
>>>> 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
>>>> }
>>>>
>>>