Assigning Audio Outputs (Audio, Auxiliary Input, Master Fader, and Instrument Tracks)
To assign an audio output of an audio, Auxiliary Input, Master Fader, or Instrument track:
In the Mix or Edit window, click the track’s Output Path selector and choose from the available audio interface channels and busses. Stereo tracks have outputs available as pairs.
The Output Path selector lets you route a track to any available audio output or internal bus. Outputs in use by another track appear bold in the Output Path selector’s pop-up menu.
Command-Option-click (Mac) or Control-Alt-click (Windows) the Output Path selector of the left-most track and select the first Output Path (mono or stereo). All visible tracks are automatically assigned to unique Output Bus Path assignments in ascending order. For example, Track 1 to A1–2 and Track 2 to A3–4.