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pw-loopback:tldr:9a56a
The command you provided is using the "pw-loopback" utility. This utility allows you to capture and playback audio using PipeWire, a server and API for handling multimedia pipelines in Linux.
Let's break down the command and its arguments:
-
pw-loopback
: This is the command that starts the "pw-loopback" utility. -
--capture-props='${media-class=Audio-Sink audio-position=[FL FR]}'
: This argument specifies the properties for capturing audio. Here, it sets the media class to "Audio-Sink" and the audio position to "[FL FR]". "FL" stands for Front Left, and "FR" stands for Front Right. So, this property indicates that audio should be captured from the front left and front right channels. -
--playback-props='${audio-position=[FR FL]}'
: This argument specifies the properties for audio playback. Here, it sets the audio position to "[FR FL]". This property indicates that audio should be played back to the front right and front left channels.
In summary, this command configures the "pw-loopback" utility to capture audio from the front left and front right channels and play it back to the front right and front left channels.