Thanks for the reply to my previous posting, but although that helped, I've still got MAJOR problems. I can create only two MIDI tracks and get the assigned sounds to play, but as soon as I try to assign a sound to a third MIDI track the CPU in the computer goes berserk with red lights flashing everywhere. Surely I can't be overloading the processor with only 3 MIDI tracks assigned. Have I missed a setting somewhere? How much processor memory does one track use? I've got umpteen gigabytes of harddrive memory free, but feel I'm missing a trick somewhere. Any help please??????