Not so unconventional any more but some people use MIDI to control DMX-512 based lighting systems in shows: https://www.lightjams.com/midiDMX.html https://www.

Not so unconventional any more but some people use MIDI to control DMX-512 based lighting systems in shows: https://www.lightjams.com/midiDMX.html https://www.lightjams.com/midiDMX.html This makes for a much cheaper lighting controller (any old keyboard with MIDI) and lets you sync the lights to the music when part of the music is MIDI based. Relatively new controllers such as the Linnstrument and Seaboard Rise can output MIDI MPE to control many musical parameters at the same time in expressive ways. In your thinking about unconventional uses for MIDI, MPE might give you a lot more data to work with. I created two video camera based Theremin's to output MIDI data a long time ago, one for a PC and one for an Amiga: http://zoom.interoscitor.com/InterOscitor/ http://zoom.interoscitor.com/InterOscitor/ http://zoom.interoscitor.com/PetersonEnterprises/videotheremin/vt.html http://zoom.interoscitor.com/PetersonEnterprises/videotherem...