I am recording on track 1 in Real Band an audio rhythm from an external drum machine. I then listen to track 1 and record on track 2 audio guitar. I would like to be able to adjust the track 1 rhythm volume in the final mix therefore do not want to merge track 1and 2 in order to save it and open it in BIAB to use the Chord Wizard and then add a style with bass, brushes, and other instruments after which I save it and open it in Real Band for the final mix. At this point I want to add the original track 1 rhythm from the original work back in for the final mix.

My question is "is there a way to add a single track to a multi track composition after generating other tracks in BIAB?"