cliff martinez (composer for drive and other refn movies, solaris, traffic, etc.) uses this. very cool.

Monty Python and The Muppets separately had sketches about animals trained/tuned to squeal at a particular pitch when hit. They were assembled into an instrument that allowed a sadist play tunes on them with hammers.

Between the timbre of the notes and the look of the 'keys', from start to finish I couldn't stop thinking of this instrument as the same, but using pleasure instead of pain (if you get my meaning).

*water

Adding video to channels (Water) - requested by Zawash.