Photograph of Dimitri Tiomkin conducting orchestra for Duel in the Sun, 1946

Music has been an integral part of motion pictures since the earliest days of filmmaking. While full orchestral scores were written especially for select major productions such as The Birth of a Nation (1915) and The Thief of Bagdad (1924), most early films were shown accompanied by a pianist or organist who had compiled the score from a small sheet music library that was organized by mood. The pianist synchronized the music to the film by using a “cue sheet,” a list of the film’s action and title cards in the order in which they appear. Whether for an exciting chase sequence or a tender love scene, for suspense or nostalgia,…