This is an electronic music piece, or sketch. Some combination of exponential FM, LFOs, and envelope generators is making what sounds like an arpeggiated sequence that is fairly musical (this is all hardware). Previously have used MIDI notes from the computer to "impose" a tune on hardware-generated glop but here the reverse is happening: the MIDI makes the musical sequence go all wonky and atonal. You can hear when those notes come in and leave. Some knob-turning is happening while all this is going on but mostly it's just letting the machines do the work.