Here is a picture of the drum setup I used for Oklahoma! Notice the volume control pedal.I plugged the output of the MIDI keyboard into the pedal's INPUT1 jack, and the amplifier to the pedal's OUTPUT1 jack. (If you click on the image, you'll notice that the pedal is not connected to anything. It drains the 9V battery when connected. Good thing I had extra batteries and a screwdriver in my bag :-) BTW, I had to replace the little 15 watt amp with a 65 watt tube amp for the performances because the former was being overpowered by the rest of the orchestra. I must say, this setup worked like a charm.
