Limit the Number of Audio Tracks You Use
Final Cut Pro supports up to 99 tracks of audio in a sequence. However, EDLs only
support two or four tracks of audio, depending upon the EDL and video format you use.
If your sequence has more than four tracks, you may have to export separate EDLs. A
simple way to do this is to copy your sequence and delete everything except the audio
tracks that weren’t included in the first EDL. Then export an EDL just for the remaining
audio tracks.