While the MF can be powered by USB though not batteries, its MIDI implementation is uniquely restricted and I'd not recommend it as a MIDI device of any kind. I've been constantly frustrated by its non-standard Continuous Controllers set. It is perhaps the only MIDI synth ever made that doesn't send or receive MIDI Volume (CC#7). The keyboard works in its own peculiar way but it's only two octaves and doesn't generate velocity. I use a digital piano and a Yamaha synth to play my MF. Keep your Korg.
