The key is the song memory button with the up and down keys. It has banks 500-504 (5 memory banks). Haven't been successful with playing all tracks at once or using it as general midi as of yet. I'm trying! One thing I regret is that my software got messed up (Years of neglect at the stack of cd's without cases) . Do you have it? Is it important? Can't find it anywhere online and radioshack doesn't help at all.
Odorobou, December 2010