Surprisingly, according to the head engineer, I'm told there are no sysex commands to reverse-engineer. What there is is already on the the support site, so it must just be the button-presses and whatever else is in that document. MIDI CC can be assigned to almost anything, but apparently there is nothing pre-assigned. Not sure how this interfaces with the syses seq out option, but it didn't sound from them like it changed much…
-Brian
