Track, Edit Ensemble Window (Ensemble Edition only)
If different instruments are on different stereo tracks in your audio, use these radio buttons to specify which track has the audio for the current row's instrument. Select the left radio button if the audio is on the left stereo track. Select the right radio button if the audio is on the right stereo track. If Split Stereo is disabled, then the stereo tracks are mixed together and the Track setting therefore has no effect.