Piping Audio Between Apps

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Loopback creates your first virtual audio device at launch. You can use the default “Loopback Audio” device to pipe audio between programs without any additional configuration. This is known as a pass-thru device.

Set “Loopback Audio” as the output in apps from which you wish to pull audio, and the input in apps which should receive that audio. That's it — audio will flow out of one application and into another.