1 files changed, 96 insertions, 0 deletions
diff --git a/modules/audio.nix b/modules/audio.nix
new file mode 100644
index 0000000..e926076
--- /dev/null
+++ b/modules/audio.nix
@@ -0,0 +1,96 @@
+{
+  flake.nixosModules.audio = { config, lib, pkgs, ... }:
+    let
+      cfg = config.os.core.audio;
+    in
+    {
+      options.os.core.audio = {
+        enable = lib.mkEnableOption "audio support";
+        disable-devices.enable = lib.mkEnableOption "disables some random devices cluttering up";
+        noise-cancellation.enable = lib.mkEnableOption "RNNoise background noise cancellation";
+      };
+
+      config = lib.mkMerge [
+        (lib.mkIf cfg.enable {
+          services.pulseaudio.enable = false;
+          security.rtkit.enable = true;
+
+          services.pipewire = {
+            enable = true;
+            audio.enable = true;
+            pulse.enable = true;
+            alsa = {
+              enable = true;
+              support32Bit = true;
+            };
+            jack.enable = true;
+            
+            wireplumber = {
+              enable = true;
+              extraConfig."99-lock-microphone-gain"."pulse.rules" = [{
+                  matches = [ { "application.name" = "~*cord*"; } ];
+                  actions.quirks = [ "no-source-volume" ];
+                }];
+            };
+          };
+          services.playerctld.enable = true;
+
+          environment.systemPackages = with pkgs; [
+            crosspipe
+            pulsemixer
+            pavucontrol
+            alsa-utils
+          ];
+        })
+
+        (lib.mkIf cfg.disable-devices.enable {
+          services.pipewire.wireplumber.extraConfig = {
+            "99-disable-devices"."monitor.alsa.rules" = [{
+              matches = [
+                { "device.name" = "~alsa_card.pci-0000_03_00.1*"; }
+                { "device.description" = "~USB Audio*"; }
+              ];
+              actions.update-props."device.disabled" = true;
+            }];
+          };
+        })
+
+        (lib.mkIf cfg.noise-cancellation.enable {
+          services.pipewire.extraConfig.pipewire."99-rnnoise" = {
+            "context.modules" = [
+              {
+                name = "libpipewire-module-filter-chain";
+                args = {
+                  "node.description" = "Noise Canceling Source";
+                  "media.name" = "Noise Canceling Source";
+                  "filter.graph".nodes = [
+                    {
+                      type = "ladspa";
+                      name = "rnnoise";
+                      plugin = "${pkgs.rnnoise-plugin}/lib/ladspa/librnnoise_ladspa.so";
+                      label = "noise_suppressor_mono";
+                      control = {
+                        "VAD Threshold (%)" = 50.0;
+                        "VAD Grace Period (ms)" = 200.0;
+                        "Retroactive VAD Grace Period (ms)" = 0.0;
+                      };
+                    }
+                  ];
+                  "capture.props" = {
+                    "node.name" = "effect_input.rnnoise";
+                    "node.passive" = true;
+                    "audio.position" = [ "MONO" ];
+                  };
+                  "playback.props" = {
+                    "node.name" = "effect_output.rnnoise";
+                    "media.class" = "Audio/Source";
+                    "audio.position" = [ "MONO" ];
+                  };
+                };
+              }
+            ];
+          };
+        })
+      ];
+    };
+}