I thought I could do this but I can't find anything in the manual or see anything on the psr2000. Can I use a foot pedal to turn Vocal Harmony off/on? I have a Yamaha pedal that I originally bought for a psr740 and it seems to work properly to trigger an event. (Except it's backwards... sustain is ON with it not depressed and OFF with it depressed... so, I assume I can reverse polarity on it and fix that.)