Theremin An Electronic Odyssey is a 1993 documentary film directed by Steven M. Martin about the life of Leon Theremin and his invention, the theremin, a pioneering electronic musical instrument. It follows his life, including being imprisoned in a Soviet gulag, and the influence of his instrument, which came to define the sound of eerie in 20th Century movies, and influenced popular music as it searched for and celebrated electronic music in the 1960s.
Janet Maslin of The New York Times called the film a fascinating, offbeat documentary that stands as a fine job of detective work.
Source: Wikipedia