I loaded Logic Studio today. I haven't even set up my interface yet, but I wanted to hear sounds Logic ships with the program, so I dropped a Midi file from a piano prelude I wrote ages ago, and was going to arrange on Opcode Vision. So I dropped it in the top track and it accepted it just fine and dandy. I chose a Bosedorfer to play it back and it sounded pretty fair, especially since I was listening through the MBP speakers... I copied the track and placed it in track two, deleted notes, and selected a choir to "sing what was left". Both tracks played the choir. Early this year I produced a disco show on Garage Band, and it was all very intuitive, but Logic seems not to be. I read several people's inquiries into similar issues, although they all were dealing with plugin 3rd party stuff. I couldn't make sense of the questions or the answers. Are there simple steps to follow to get tracks to play back different instruments?