{
  config,
  lib,
  pkgs,
  flakeArgs,
  ...
}: let
  inherit (flakeArgs) inputs;
  inherit (lib) optionals mkEnableOption mkIf mkDefault;
  cfg = config.nixfiles.hardware.sound;
in {
  # Enable sound.
  # sound.enable = true;
  # hardware.pulseaudio.enable = true;

  options.nixfiles.hardware.sound = {
    enable = mkEnableOption "sound configuration";
    useUnstableUcmConf = lib.mkOption {
      description = "Whether to enable unstable alsa-ucm-conf. This seems to cause a mass rebuild and requires a lot of packages to be built from source, so it should only be used if necessary.";
      default = false;
      example = true;
      type = lib.types.bool;
    };
  };

  config = lib.mkMerge [
    (mkIf cfg.enable {
      security.rtkit.enable = mkDefault true;
      services.pipewire = {
        enable = true;
        alsa.enable = mkDefault true;
        alsa.support32Bit = mkDefault config.services.pipewire.alsa.enable;
        pulse.enable = mkDefault true;
        jack.enable = mkDefault true;
        extraConfig.pipewire = {
          # this should fix the extreme audio crackling in WINE
          # note: this increases audio latency to 960/48000 (20ms)
          "10-clock-config" = {
            "context.properties" = {
              "default.clock.min-quantum" = 960;
            };
          };
        };
      };

      environment.systemPackages = with pkgs;
        [
          qpwgraph
          easyeffects
        ]
        ++ optionals config.services.pipewire.pulse.enable [
          pavucontrol
          ncpamixer
          pulsemixer
        ];
    })
    {
      # use alsa-ucm-conf from unstable (fixes Scarlett Solo channels)
      nixpkgs.overlays = lib.optional cfg.useUnstableUcmConf (final: prev: {
        inherit (inputs.nixpkgs-unstable.legacyPackages.${pkgs.system}) alsa-ucm-conf;
      });
    }
  ];
}