For people updating: Feed it a HOT ass signal, I ended up using the headphone outs on my mixer cranked way up. Very cool update though..

And as far as the "Korg never meant for it to have midi" comment, It has a full midi implementation thats programmed into the firmware by Korg. Drums work on Channel 10 per GM spec, all controls send midi CCs (albeit slowly), LFO parameters have CCs assigned to them, and even the tempo light blinks to the midi clock. I have mine midi'd up and it works exactly like any midi device should. The only thing it lacks is an midi port and optocoupler, $5 dollars in parts. The real question is why they left it out since the work has already been done.