pw-loopback

Create a loopback device with default behavior

$ pw-loopback

$ pw-loopback -m '[FL FR]' -i 'media.class=Audio/Sink'

$ pw-loopback -m '[FL FR]' -o 'media.class=Audio/Source'

$ pw-loopback -m '[FL FR]' -i 'media.class=Audio/Sink' -o 'media.class=Audio/Source'

$ pw-loopback -i 'media.class=Audio/Sink audio.position=[FL FR]' -o 'audio.position=[FR FL]'

pw-loopback [options]

pw-loopback creates virtual loopback audio devices in PipeWire. Loopback devices capture audio from one source and play it back to another destination, enabling audio routing between applications or devices.
The tool can create sink devices (for capturing audio output), source devices (for providing audio input), or combined loopback configurations for audio monitoring and routing.

-m, --channel-map map

Set the channel map for the loopback

Set properties for the capture side (sink)

Set properties for the playback side (source)

Display help message

Channel mapping and media class properties must be specified correctly for proper automatic connection behavior. Incorrect configuration may result in audio routing issues or silent devices.

Part of PipeWire, the modern multimedia framework for Linux. Provides flexible audio routing capabilities similar to PulseAudio's module-loopback but with PipeWire's graph-based architecture.

pipewire(1), pw-cli(1), pw-link(1)