SD2 has no physical button controls on it other than on/off power switch and one Volume slider.

All other commands are done thru MIDI input by software or another MIDI device, depending on your setup.

It is possible to send MIDI data to the SD2 and "confuse" it occasionally, but since the SD2 performs a hardware reset at power on, everytime, toggling the power button puts the SD2 back in its original startup mode, which includes the GM ON by default.


--Mac