Yes, for the song in question, press the Song Settings button (or menu Edit-Song Settings) and set Allow RealTracks Holds and Pushes to false (for that song). That would disable all instruments for RealTracks pushes/holds in that song, if you just want to disable one, you could freeze the tracks first, and then turn the feature off and just generate that one track.


Have Fun!
Peter Gannon
PG Music Inc.