pipewire-void

1) Install the pipewire package and this minimal set of required plugins:
libspa-alsa-0.3.17_1 # The alsa backend
libspa-audioconvert-0.3.17_1
libspa-audiomixer-0.3.17_1 # For mixing multiple streams
(these should be eventually added as dependencies to pipewire, basic functionality doesn't work without them)

2) Start the pipewire server as user:
$ pipewire

This is enough to play audio with `pw-play song.wav`

== Using Pipewire as a Pulseaudio replacement ==

In addition to the above,

1) Uncomment the following line in /etc/pipewire/pipewire.conf:
#exec /usr/bin/pipewire-pulse

NOTE: I didn't have pulseaudio installed, which might conflict due to dbus magic (probably not, nobody reported this)

== ALSA integration (make libasound clients use pipewire) ==

1) Install alsa-pipewire

2) Enable the pipewire alsa device and make it the default device:
# mkdir -p /etc/alsa/conf.d
# ln -s /usr/share/alsa/alsa.conf.d/50-pipewire.conf /etc/alsa/conf.d
# ln -s /usr/share/alsa/alsa.conf.d/99-pipewire-default.conf /etc/alsa/conf.d

== TODO: Investigate (non-fatal) errors ==

[E][000001705.850547][bluez-monitor.c:453 sm_bluez5_monitor_start()] can't load api.bluez5.enum.dbus: No such file or directory
[E][000001705.974450][core.c:71 core_event_error()] core 0x560d1f4c12a0: proxy 0x560d1f4f7420 id:4: bound:-1 seq:4 res:-2 (No such file or directory) msg:"can't create device: No such file or directory"
[E][000001705.974485][media-session.c:1991 core_error()] error id:4 seq:4 res:-2 (No such file or directory): can't create device: No such file or directory

Last two go away when libspa-jack is installed (is it because I have jack installed? or due to /etc/pipewire/media-session.d/with-jack?)