nixos/system/services/audio.nix

{ config, pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
    pulseaudio
    alsa-utils
  ];
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    wireplumber = {
      enable = true;
      package = pkgs.wireplumber;
    };
  };
}