niksos/hosts/niks/pipewire.nix

{
    config,
    pkgs,
    ...
}: {
    services.pipewire = {
        enable = true;
        alsa.enable = true;
        alsa.support32Bit = true;
        pulse.enable = true;
    };

    security.rtkit.enable = true;

    environment.etc = let
        json = pkgs.formats.json {};
        rate = "48000";
        quantum = "128";
    in {
        "pipewire/pipewire.conf.d/92-low-latency.conf".text = ''
            context.properties = {
                default.clock.rate = ${rate}
                default.clock.quantum = ${quantum}
                default.clock.min-quantum = ${quantum}
                default.clock.max-quantum = ${quantum}
            }
        '';
        "pipewire/pipewire-pulse.d/92-low-latency.conf".source = json.generate "92-low-latency.conf" {
            context.modules = [
                {
                    name = "libpipewire-module-protocol-pulse";
                    args = {
                        pulse.min.req = "${quantum}/${rate}";
                        pulse.default.req = "${quantum}/${rate}";
                        pulse.max.req = "${quantum}/${rate}";
                        pulse.min.quantum = "${quantum}/${rate}";
                        pulse.max.quantum = "${quantum}/${rate}";
                    };
                }
            ];
            stream.properties = {
                node.latency = "${quantum}/${rate}";
                resample.quality = 1;
            };
        };
    };
}