I've had FM Essentials on my iPhone for a while but haven't had much time to play with it. I hooked the iPhone up to a Korg Kross 2 last night and tried FM Essentials (the MX was in a travel case for a gig tonight). It sounded great and I was suprised to find the FM sounds played through USB and out the Korg outputs. I tried it today with the MX and it seems the sounds only come from the iPhone without any output from the MX outs. Is this because the original MX was not fully USB class compliant or do I have something set up wrong on the MX (version 1)? I really appreciate the FM app but I suspect using it with a Korg product isn't what Yamaha had in mind. Thanks.