https://guthman.gatech.edu/
The 2019 prizewinner was a theremin-like device called "The Glide" based on a pair of accelerometers.

http://www.earrelevant.net/2019/03/the- ... mpetition/
I thought inventor Keith Groover's interpretation of Rachmaninoff's Vocalise was pretty neat, so when I spotted one going cheap on Reverb just now I couldn't resist...
