Send Linux desktop audio to USB 1/2, 3/4, 5/6 … of a multichannel USB
audio interface without opening a DAW or patch bay.

Many USB mixers (Mackie ProFXv3, PreSonus ARc, Allen & Heath ZEDi, …) expose
more than one stereo return pair from the computer. Linux shows them as one
"Surround 4.0" device and plays everything to the first pair. This tray icon
shows which pair desktop audio reaches and switches it with one click.

More Information: https://github.com/jweigend/USBPlaybackRouter

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2026-09-03
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