Upstream's config does not autostart pipewire-media-session anymore, which
is an essential component. It's not easy to start it externally in a script
since it needs the pipewire socket up, and Void doesn't have a mechanism to
ensure it (systemd socket activation).
--- a/src/daemon/pipewire.conf.in	2021-03-18 17:45:02.025992827 +0100
+++ b/src/daemon/pipewire.conf.in	2021-03-18 17:47:17.606999440 +0100
@@ -204,7 +204,7 @@
     # but it is better to start it as a systemd service.
     # Run the session manager with -h for options.
     #
-    @comment@{ path = "@media_session_path@"  args = "" }
+    { path = "@media_session_path@"  args = "" }
     #
     # You can optionally start the pulseaudio-server here as well
     # but it is better to start it as a systemd service.