sway: enable audio

media keys don't work (except in VLC!)

helpers/gui/sway.nix

@@ -6,6 +6,7 @@
     # we configure sway with home-manager, but this enable gets us e.g. opengl and fonts
     enable = true;
   };
+
   # TODO: should be able to use SDDM to get interactive login
   services.greetd = {
     enable = true;
@@ -18,5 +19,31 @@
     };
   };
 
+  # unlike other DEs, sway configures no audio stack
+
+  # sound (ALSA): https://nixos.wiki/wiki/ALSA
+  # test with `alsamixer`, `aplay -t raw /dev/urandom`
+  # sound = {
+  #   enable = true;
+  #   mediaKeys.enable = true;
+  # };
+  # hardware.pulseaudio.enable = true;
+  # hardware.pulseaudio.support32Bit = true;    ## If compatibility with 32-bit applications is desired.
+
+  # # disable PC-speaker
+  # boot.blacklistedKernelModules = [ "snd_pcsp" ];
+  # # enable the right driver (`cat /proc/asound/modules`)
+  # boot.extraModprobeConfig = ''
+  #   options snd slots=snd-hda-intel
+  #   options snd_hda_intel enable=0,1
+  # '';
+
+  # administer with pw-cli, pw-mon, pw-top commands
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;  # ??
+    pulse.enable = true;
+  };
 }