I was experimenting with the piano track on a backing track I was working on and changed to one of the super midi tracks and it sounded okay but I decided to go back the live track and I no longer got sound from the piano track. I could load the live track but no sound it looked like on the mixer it had output generated. I had to recopy my chord chart to a new file to get it to work. I had even tried deleting the midi and audio on the track but if I loaded a live track I got no sound.....everything else played but that one track.....any ideas?