The problem is not with the SD2, but the Yamaha PSR S900. When you play a midifile from that unit, you need to make sure the only signal comming out of the Yamaha is that of the midifile.

If in doubt, try playing back that SAME midifile from a computer hooked to the SD2 and you'll see.

Thanks,

AJ
_________________________
[KETRON - USA]
Design Engineer & Product Specialist.
www.KetronAmerica.com