How to play the theremin
The sound of the theremin is most familiar from Hitchcock and science fiction soundtracks, and a version features in Good Vibrations by The Beach Boys.
The original instrument was tried out by the Soviet leader Vladimir Lenin in 1922, during an audience with its inventor, Leon Theremin.
As a young girl, Lydia Kavina was taught to play by theremin himself. Here she gives lesson one for beginners.