The man in this semi-fictional vignette was Lev Sergeyevich Termen, better known in the western world as Léon Theremin. You know Theremin for the musical instrument which bears his name.

[Keystone Science] recently posted a video about building a theremin — you know, the instrument that makes those strange whistles when you move your hands around it. The circuit is pretty simple ...

He is equally comfortable with the organ, piano, and electronic keyboards and synthesizers, and also sings and plays the Theremin. He believes music is very important in helping bring people ...

Theremins are played by moving your hands near (but not touching) two antenna. One antenna controls pitch, the other controls volume. Theremins work by creating two AC currents using two capacitors ...