PipeWire default mic RNNoise

PIPEWIRE_RNNOISE.md

Prerequisites

Your distribution must use PipeWire as default audio server. To confirm this run pactl info and make sure it includes a line similar to:

Server Name: PulseAudio (on PipeWire 0.3.83)

Install packages

For Arch: sudo pacman -S rnnoise noise-suppression-for-voice

If you know how to install it on other distributions please leave a comment so I can add it here

Setup filter chain

mkdir -p ~/.config/pipewire/filter-chains

Edit ~/.config/pipewire/filter-chains/source-noise-suppression.conf

# Noise canceling source
#
# start with pipewire -c filter-chain/source-rnnoise.conf
#
context.properties = {
    log.level = 2
}
context.spa-libs = {
    audio.convert.* = audioconvert/libspa-audioconvert
    support.*       = support/libspa-support
}
context.modules = [
    { name = libpipewire-module-rt
        args = {
            #rt.prio      = 88
            #rt.time.soft = -1
            #rt.time.hard = -1
        }
        flags = [ ifexists nofail ]
    }
    { name = libpipewire-module-protocol-native }
    { name = libpipewire-module-client-node }
    { name = libpipewire-module-adapter }
    { name = libpipewire-module-filter-chain
        args = {
            node.name        = "effect_input.audio_cleaner"
            node.description = "Audio Cleaner"
            audio.channels   = 1
            audio.position = [ MONO ]
            media.name       = "On The Fly Audio Cleanup"
            filter.graph = {
                nodes = [
                    {
                        type   = ladspa
                        name   = rnnoise
                        plugin = librnnoise_ladspa
                        label  = noise_suppressor_mono
                        control = {
                            # Input
                            # Output
                            "VAD Threshold (%)" 75.0
                        }
                    }
             
                ]
      
            }
            capture.props = {
                node.passive = true
                audio.channels = 1
                audio.position = [ MONO ]
      
            }
            playback.props = {
                audio.channels = 1
                media.class = Audio/Source
                audio.position = [ MONO ]
              
              
            }
        }
    }
    
]

Setup systemd user service

mkdir -p ~/.config/systemd/user

Edit ~/.config/systemd/user/pipewire-input-filter-chain.service

[Unit]
Description=PipeWire Input Filter Chain
After=pipewire.service
BindsTo=pipewire.service

[Service]
ExecStart=/usr/bin/pipewire -c /home/nico/.config/pipewire/filter-chains/source-noise-suppression.conf
Type=simple
Restart=on-failure

[Install]
WantedBy=pipewire.service

Make sure to change nico to your username!

sed -i "s/nico/$USER/" ~/.config/systemd/user/pipewire-input-filter-chain.service

Enable and start now with

systemctl --user enable --now pipewire-input-filter-chain.service