I don't know for certain, but I have very strong doubts that whatever JMJ is doing with those knobs has anything to do with the music. Usually musicians play, a

I don't know for certain, but I have very strong doubts that whatever JMJ is doing with those knobs has anything to do with the music. Usually musicians play, and sound engineers deal with the knobs. JMJ doesn't play, so somebody else is playing in his place (if the music isn't simply recorded). The knobs might do something, or JMJ is just pulling a show of how technological his music is. EDIT: read elsewhere in the thread that those are modular synths, so I guess he might be in charge of making the nice whirling sound. Still, it's not like he's someone playing on a keyboard - where every single key is an option. Most of the knobs will be preconfigured to produce exactly that sound (it's the same as in the record) and the ones he's turning are probably doing a few definite things.