Don Juan. 1926. Music by Dr William Axt, lyrics by Harry Lee. Theme song of the Warner Bros movie featuring John Barrymore and Mary Astor. George Groves, on assignment to Vitaphone, was charged with recording the soundtrack to the film. He devised an innovative, multi-microphone technique and performed a live mix of the 107-strong orchestra. In doing so he became the first music mixer in film history. The music was played by the New York Philharmonic.