I've got a bit of a crazy idea to try and build one of those 'invisible' MIDI harps (I think Jean Michel Jarre once used them). Essentially there would be a bunch of light beam sensors of some sort (I'd probably only do an octave), in the ceiling, shining *directly* onto light sensors in the floor. As soon as the light is broken, the sensor triggers and results in a MIDI signal being sent.
OK, so from that description, I've clearly little idea what I'm doing and what the best way to go about this would be. I'm not adverse to actually buying a little MIDI keyboard and pulling it apart to provide me with some sort of latch-MIDI implementation. The trickiest bit, I'd imagine, would be to get a system where the sensors aren't affected by light from the adjacent bulbs - the lights would have to shine
down into the sensors and not spread at all. Or is visible light not the way to go - should I use infra-red of some sort?
Given all that, is there any advise anyone can give me please?! Anyone seen this project done anywhere?