Dr. Samuel J. Hoffman (born July 23, 1903 in Manhattan; died December 6, 1967) was a notable thereminist who played with Les Baxter and played theremin on several film soundtracks. He was also an adviser on soundtracks, like the one for Spellbound (1945 film), as he was the only thereminist in the Los Angeles Musician's Union. Like many early thereminist he started as a violinist. He was referred to as "Doctor" because he was also a podiatrist. Wikipedia
The definitive Wikipedia entry for Dr. Samuel Hoffmann. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Dr%2e_Samuel_Hoffmann