TLDR
Enter a command. For example: speedometer, locate, nixos option.

pw-loopback

 
Tool for creating loopback devices in pipewire. More information: https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Virtual-Devices.
 
  • Create a loopback device with the default loopback behavior:
     
    pw-loopback
     
  • Create a loopback device that automatically connects to the speakers:
     
    pw-loopback -m '{{[FL FR]}}' --capture-props='{{media.class=Audio/Sink}}'
     
  • Create a loopback device that automatically connects to the microphone:
     
    pw-loopback -m '{{[FL FR]}}' --playback-props='{{media.class=Audio/Source}}'
     
  • Create a dummy loopback device that doesn't automatically connect to anything:
     
    pw-loopback -m '{{[FL FR]}}' --capture-props='{{media.class=Audio/Sink}}' --playback-props='{{media.class=Audio/Source}}'
     
  • Create a loopback device that automatically connects to the speakers and swaps the left and right channels between the sink and source:
     
    pw-loopback --capture-props='{{media.class=Audio/Sink audio.position=[FL FR]}}' --playback-props='{{audio.position=[FR FL]}}'
     
  • Create a loopback device that automatically connects to the microphone and swaps the left and right channels between the sink and source:
     
    pw-loopback --capture-props='{{audio.position=[FR FL]}}' --playback-props='{{media.class=Audio/Source audio.position=[FL FR]}}'

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