{
  config,
  lib,
  pkgs,
  ...
}:
# PipeWire as the desktop audio server.
{
  options.modules.desktop.utilities.audio.enable = lib.mkEnableOption "the PipeWire audio server";

  config = lib.mkIf config.modules.desktop.utilities.audio.enable {
    registry.keybind.${config.networking.hostName} = {
      media-play = {
        keys = "XF86AudioPlay";
        locked = true;
        action = {
          kind = "exec";
          command = "${pkgs.playerctl}/bin/playerctl play-pause";
        };
      };

      media-next = {
        keys = "XF86AudioNext";
        locked = true;
        action = {
          kind = "exec";
          command = "${pkgs.playerctl}/bin/playerctl next";
        };
      };

      media-previous = {
        keys = "XF86AudioPrev";
        locked = true;
        action = {
          kind = "exec";
          command = "${pkgs.playerctl}/bin/playerctl previous";
        };
      };
    };

    # Realtime scheduling for the audio threads, so playback survives load.
    security.rtkit.enable = true;

    services.pipewire = {
      enable = true;
      alsa.enable = true;
      pulse.enable = true;
    };
  };
}