nixos/tests/firefox: use hardware.alsa

nixos/tests/firefox.nix

@@ -18,37 +18,15 @@ import ./make-test-python.nix ({ lib, pkgs, firefoxPackage, ... }:
         package = firefoxPackage;
       };
 
-      # Create a virtual sound device, with mixing
-      # and all, for recording audio.
-      boot.kernelModules = [ "snd-aloop" ];
-      environment.etc."asound.conf".text = ''
-        pcm.!default {
-          type plug
-          slave.pcm pcm.dmixer
-        }
-        pcm.dmixer {
-          type dmix
-          ipc_key 1
-          slave {
-            pcm "hw:Loopback,0,0"
-            rate 48000
-            periods 128
-            period_time 0
-            period_size 1024
-            buffer_size 8192
-          }
-        }
-        pcm.recorder {
-          type hw
-          card "Loopback"
-          device 1
-          subdevice 0
-        }
-      '';
+      hardware.alsa = {
+        enable = true;
+        enableRecorder = true;
+        defaultDevice.playback = "pcm.recorder";
+      };
 
       systemd.services.audio-recorder = {
         description = "Record NixOS test audio to /tmp/record.wav";
-        script = "${pkgs.alsa-utils}/bin/arecord -D recorder -f S16_LE -r48000 /tmp/record.wav";
+        script = "${pkgs.alsa-utils}/bin/arecord -Drecorder -fS16_LE -r48000 -c2 /tmp/record.wav";
       };
 
     };