Improve audio control support

nixos/desktop/common.nix

@@ -1,8 +1,14 @@
-{ ... }:
+{ pkgs, ... }:
 {
   # Enable CUPS to print documents.
   services.printing.enable = true;
 
+  environment.systemPackages = [
+    pkgs.pavucontrol
+    pkgs.pamixer
+    pkgs.pulseaudio
+  ];
+
   # Enable sound with pipewire.
   sound.enable = true;
   hardware.pulseaudio.enable = false;
@@ -13,4 +19,5 @@
     alsa.support32Bit = true;
     pulse.enable = true;
   };
+  programs.noisetorch.enable = true;
 }