Yeah.. Is it?
In what sense? You won't be able to process external audio using the onboard filter etc because all the sounds, filters and effects are 100% digital on the MC303, unless i'm very much mistaken. Unless you want to rewrite the firmware and build a load of new digital circuitry its probably not going to happen.
I see. I was hoping I could somehow route external audio through its effect processor as I don't use it for anything else anyway. Thanks for the reply