copnix/nixos/desktop/audio/pipewire.nix

{ config, pkgs, ... }:

{
  services.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    wireplumber.enable = true;

    extraConfig.pipewire."92-quantum" = {
      "context.properties" = {
        "default.clock.rate" = 48000;
        "default.clock.allowed-rates" = [ 48000 ];
        "default.clock.quantum" = 1024;
        "default.clock.min-quantum" = 1024;
        "default.clock.max-quantum" = 1024;
      };
    };
  };

  services.wireplumber.extraConfig."51-no-mic-monitor" = {
    "monitor.alsa.rules" = [
      {
        matches = [ { "node.name" = "~alsa_input.*"; } ];
        actions = {
          "update-props" = {
            "stream.dont-remix" = true;
          };
        };
      }
    ];
  };
}