Hi, I'm new to GB and have just downloaded a midi file that I found on the web into GB as an exercise. The first time I played the file I got a message saying there was too many realtime instruments (or words to that effect) did I want to continue which I did. I've removed some of the duplicated tracks and the midi file plays okay but I can't change the volume or pan on any of the tracks except for the drum track. I can change the pitch of all the tracks from the editor. My suspicion is that GB has rendered all but one of the tracks to disc as Audio so it can play the file or somehow the tracks have been locked by the author. Anyone any idea what's happening and how I might correct it? Thanks