pipewire-config.nix

  services.pipewire = {
	  enable = true;
	  pulse.enable = true;
	  alsa.enable = true;
    alsa.support32Bit = true;
	  jack.enable = true;
    config.pipewire = {
      "context.properties" = {
        "link.max-buffers" = 16;
        "log.level" = 2;
        "default.clock.rate" = 96000;
        "default.clock.quantum" = 64;
        "default.clock.min-quantum" = 64;
        "default.clock.max-quantum" = 64;
        "core.daemon" = true;
        "core.name" = "pipewire-0";
      };
      "context.modules" = [
        {
          name = "libpipewire-module-rtkit";
          args = {
            "nice.level" = -15;
            "rt.prio" = 88;
            "rt.time.soft" = 200000;
            "rt.time.hard" = 200000;
          };
          flags = [ "ifexists" "nofail" ];
        }

        { name = "libpipewire-module-protocol-native"; }

        { name = "libpipewire-module-profiler"; }

        { name = "libpipewire-module-metadata"; }

        { name = "libpipewire-module-spa-device-factory"; }

        { name = "libpipewire-module-spa-node-factory"; }

        { name = "libpipewire-module-client-node"; }

        { name = "libpipewire-module-client-device"; }

        {
          name = "libpipewire-module-portal";
          flags = [ "ifexists" "nofail" ];
        }

        {
          name = "libpipewire-module-access";
          args = {};
        }

        { name = "libpipewire-module-adapter"; }

        { name = "libpipewire-module-link-factory"; }

        { name = "libpipewire-module-session-manager"; }
      ];
    };

    config.pipewire-pulse = {
      "context.properties" = {
        "log.level" = 2;
      };
      "context.modules" = [
        {
          name = "libpipewire-module-rtkit";
          args = {
            "nice.level" = -15;
            "rt.prio" = 88;
            "rt.time.soft" = 200000;
            "rt.time.hard" = 200000;
          };
          flags = [ "ifexists" "nofail" ];
        }

        { name = "libpipewire-module-protocol-native"; }

        { name = "libpipewire-module-client-node"; }

        { name = "libpipewire-module-adapter"; }

        { name = "libpipewire-module-metadata"; }

        {
          name = "libpipewire-module-protocol-pulse";
          args = {
            pulse.min.req = "64/96000";
            pulse.default.req = "64/96000";
            pulse.max.req = "64/96000";
            pulse.min.quantum = "64/96000";
            pulse.max.quantum = "64/96000";
	    "server.address" = [ "native" ];
          };
        }
      ];

      "stream.properties" = {
        node.latency = "64/96000";
        resample.quality = 1;
      };
    };


    config.client = {
        "filter.properties" = {
            "node.latency" = "32/96000";
        };

        "stream.properties" = {
            "node.latency" = "32/96000";
            "resample.quality" = 1;
        };
    };

    config.client-rt = {
        "filter.properties" = {
            "node.latency" = "32/96000";
            "resample.quality" = 1;
        };

        "stream.properties" = {
            "node.latency" = "32/96000";
        };
    };

    media-session = {
      config.alsa-monitor = {
        "rules" = [
          {
            matches = [
              {
                device.name = "~alsa_card.*";
              }
            ];
            actions = {
              update-props = {
                api.alsa.use-acp = true;
                api.alsa.soft-mixer = false;
                api.acp.auto-profile = false;
                api.acp.auto-port = false;
                api.alsa.disable-batch = true;
              };
            };
          }
          {
            matches = [
              {
                node.name = "alsa_output.usb-GuangZhou_FiiO_Electronics_Co._Ltd_FiiO_K5_Pro-00.*";
              }
            ];
            actions = {
              update-props = {
                node.nick = "FiiO K5 Pro";
                node.pause-on-idle = false;
                resample.quality = 1;
                channelmix.normalize = false;
                audio.channels = 2;
                audio.format = "S32LE";
                audio.rate = 96000;
                audio.position = "FL,FR";
                api.alsa.period-size = 64;
              };
            };
          }
        ];
      };
      config.media-session = {
        "context.modules" = [
          {
            name = "libpipewire-module-rtkit";
            args = {
              "nice.level"   = -15;
              "rt.prio"      = 88;
              "rt.time.soft" = 200000;
              "rt.time.hard" = 200000;
            };
            flags = [ "ifexists" "nofail" ];
          }

          { name = "libpipewire-module-protocol-native"; }

          { name = "libpipewire-module-client-node"; }

          { name = "libpipewire-module-client-device"; }

          { name = "libpipewire-module-adapter"; }

          { name = "libpipewire-module-metadata"; }

          { name = "libpipewire-module-session-manager"; }
        ];
      };
    };
  };