Final Cut Pro – Creating Multiple Track Audio Output
Here’s how to assign different FCP audio tracks to multiple outputs.

Multi-Track Audio Output
By default, Final Cut Pro creates a single stereo pair for audio out.
However, it will allow you to create up to 24 tracks of audio out using Sequence > Settings > Audio Outputs.
Once you’ve created the number of output tracks you need, you still need to assign each Final Cut audio track to an output.
To do this, Control+click between the A1 patch and the padlock icon on the left side of the Timeline. Then, from the pop-up menu, select the output channel you want to assign for that track.
Note: Final Cut does not allow you to assign the same track to more than one output. You can, however, assign multiple audio tracks to the same output.
Courtesy of Larry Jordan












David Langley
February 10th, 2010 at 04:29
I use this a lot for making master tapes because I’ll do a 4-channel master with channels 1 & 2 mixed and 3 & 4 split. One consistent hoop I have to jump through when making masters like that, particularly with projects that have lots of audio layers, is I have to make a separate stereo audio mix file for the mixed audio because some video hardware can’t keep up with processing the same audio files on different tracks in different ways (mixed vs. split). The workaround is to clone the sequence, make a stereo AIFF bounce of all the audio, drag all the audio layers down 2 tracks and then set the stereo mix on channels 1 & 2 for stereo, while the rest of the tracks comprise the split audio. You then use the above tip to divide up your tracks for the split, and once you’re done you can make your 4 channel master tape (e.g. DigiBeta or DVC Pro 50).