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pw-loopback:tldr:5b75e
This command is using the "pw-loopback" tool with certain parameters and options. Let's break it down:
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"pw-loopback" is a command-line tool in PipeWire, an open-source multimedia framework. It allows you to create virtual audio devices and routes audio between different sources and sinks.
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"-m '${[FL FR]}'" specifies the mapping of the virtual audio channels. In this case, it is set to '${[FL FR]}' which means it maps the channels "FL" and "FR" (left and right front channels) to the virtual audio device.
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"--capture-props='${media-class=Audio-Sink}'" sets the capture (recording) properties for the virtual audio device. Here, it is set to '${media-class=Audio-Sink}' which means it captures audio from an audio sink.
Overall, this command creates a virtual audio device that routes audio from the left and right front channels of an audio source to a recording device (audio sink) specified by the capture properties.