pipewire: Use noise suppression for voice

pipewire/.config/pipewire/pipewire.conf.d/input-denoising.conf

@@ -0,0 +1,33 @@
+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 = /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.rnnoise_source"
+                node.passive = true
+                audio.rate = 48000
+            }
+            playback.props = {
+                node.name =  "rnnoise_source"
+                media.class = Audio/Source
+                audio.rate = 48000
+            }
+        }
+    }
+]