I am trying to solo a guitar track, but I get some drums (cakewalk studio instruments drums) and vocals coming through, on the track, as well. Vocals are fed to an aux bus, then to the master. Guitars are routed to a different aux bus running amplitube, then to master. Drums are midi patterns run through Studio Instrument drums, then to Master bus. Does anyone know why I can't isolate the guitar track, just by itself? Thanks