Add a noise suppressed microphone

config/pipewire/pipewire.conf.d/50-blob-noise-suppression.conf

@@ -0,0 +1,35 @@
+context.modules = [
+  {
+    name = libpipewire-module-filter-chain
+    flags = [ nofail ]
+    args = {
+      node.description = "Noise Suppressed Microphone"
+      media.name = "Noise Suppressed Microphone"
+      filter.graph = {
+        nodes = [
+          {
+            type = ladspa
+            name = rnnoise
+            plugin = /usr/lib/ladspa/librnnoise_ladspa.so
+            label = noise_suppressor_mono
+            control = {
+              "VAD Threshold (%)" = 50.0
+              "VAD Grace Period (ms)" = 200
+              "Retroactive VAD Grace (ms)" = 0
+            }
+          }
+        ]
+      }
+      capture.props = {
+        node.name = "capture.blob_noise_suppression"
+        node.passive = true
+        audio.rate = 48000
+      }
+      playback.props = {
+        node.name = "blob_noise_suppression"
+        media.class = Audio/Source
+        audio.rate = 48000
+      }
+    }
+  }
+]

docs/install.md

@@ -53,7 +53,12 @@ with `--check`.
    resolves cannot cost you the other hundred and the config, service and login
    steps below. See [packages.md](packages.md).
 4. **Config** is copied into `~/.config`: `hypr/`, the themed app configs,
-   `blob/shell.json`, the uwsm environment, and `fontconfig/fonts.conf`. A
+   `blob/shell.json`, the uwsm environment, `fontconfig/fonts.conf`, and
+   `pipewire/pipewire.conf.d/50-blob-noise-suppression.conf`. That last file
+   adds a "Noise Suppressed Microphone" input, which runs the default
+   microphone through RNNoise from `noise-suppression-for-voice`; PipeWire
+   loads it at its next start, and apps use it when it is picked as their
+   input. A
    leftover Omarchy icon font in `~/.local/share/fonts` is removed, and the
    font cache is refreshed. The shell draws every icon as a Nerd Font glyph in
    the `monospace` family, and on a fresh Arch install

packages/blob.packages

@@ -56,6 +56,7 @@ pipewire-pulse
 wireplumber
 alsa-utils
 lsp-plugins-lv2
+noise-suppression-for-voice
 
 # Power and thermals
 power-profiles-daemon

uninstall.sh

@@ -107,7 +107,7 @@ if [[ -L $HOME/wallpapers ]]; then
   say "remove  ~/wallpapers symlink"
 fi
 
-for relative in blob/shell.json uwsm/default uwsm/env.d/10-blob; do
+for relative in blob/shell.json uwsm/default uwsm/env.d/10-blob pipewire/pipewire.conf.d/50-blob-noise-suppression.conf; do
   restore_or_remove "$config_dir/$relative" "$relative"
 done