I just bought an SD-2, and think it has some good sounds. Is there an inexpensive program I can use to edit the sounds, or at the very least change the presets? I want to use this in a live rig, and have a MIDI patchbay that I use for program changes. It's an older unit, and I don't think I can access individual banks like I can using a controller and sending MSB and LSB changes.