The Roli Airwave Is Both an AI Piano Teacher and a Digital Theremin

https://media.wired.com/photos/67044426aa6e27911a811d48/master/pass/theramin-gear-887825032.jpg

The Roli Airwave uses infrared cameras to track your hand movements on a keyboard. That visual data can be used to teach you how to play a song or to compose entirely new sonic creations.

https://www.wired.com/story/roli-airwave-ai-music-teacher/