sound

Below,

1. I set up Pipewire via a Gentoo NEWS item.
2. I deshittify my mic.
   1. I set up easyeffects.
   2. I add a Portage post-install hook to cleanly fix media-filter's .so (shared object) location.

1. pipewire

I use pipewire.

For installation I followed this news item (2022-07-29) as seen in eselect news read. I also added bluetooth, of course.

/etc/portage/package.use/sound

media-video/pipewire sound-server bluetooth
media-video/pulseaudio -daemon

2.1. easyeffects

Oh no! Microphone quality sucks.

I install media-sound/pavucontrol to set up mic profiles (easy level), and media-sound/easyeffects to filter out the cafetorium I'm in (medium level).

Read about EasyEffects on the ArchWiki ⇗.

/etc/portage/package.use/sound

# idk what these are, but there are so few so i add them all.
media-sound/easyeffects calf mda-lv2 zamaudio
# pulled in as dep for above
media-plugins/calf lv2

2.2 deep-filter ladspa

EasyEffects has a deep noise remover plugin. I've used it; it's light yet highly effective, given you have a GPU.

Unfortunately it expects the shared object to be in a different place from where Gentoo expects it to be.

Easy fix.

/etc/portage/package.use/sound

media-sound/deep-filter ladspa

/etc/portage/package.accept_keywords/sound

media-sound/deep-filter ~amd64

/etc/portage/env/media-sound/deep-filter

post_src_install() {
  # easyeffects expects /usr/lib64/libdeep_filter_ladspa.so
  #   to be accessible at
  # /usr/lib64/ladspa/libdeep_filter_ladspa.so
  if use ladspa; then
    ebegin "Symlinking /usr/lib64/ladspa/libdeep_filter_ladspa.so -> /usr/lib64/libdeep_filter_ladspa.so"
    mkdir -p "${D}/usr/lib64/ladspa" || die
    ln -rsf "${D}/usr/lib64/libdeep_filter_ladspa.so" "${D}/usr/lib64/ladspa/libdeep_filter_ladspa.so" || die
    eend ${?}
  fi
}

Insert a complaint about Linux mic defaults and needing an ML model here.