The Movietone sound system is an optical sound-on-film method of recording sound for motion pictures that guarantees synchronization between sound and picture. It achieves this by recording the sound as a variable-density optical track on the same strip of film that records the pictures. The initial version was capable of a frequency response of 8500 Hz. Although sound films today use variable-area tracks, any modern motion picture theater (excluding those that have transitioned to digital cinema) can play a Movietone film without modification to the projector (though if the projector's sound unit has been fitted with red LED or laser light sources, the reproduction quality from a variable density track will be significantly impaired). Movietone was one of four motion picture sound systems under development in the U.S. during the 1920s, the others being DeForest Phonofilm, Warner Brothers' Vitaphone, and RCA Photophone, though Phonofilm was primarily an early version of Movietone.

The Fox Film Corporation (also known as Fox Studios) was an American Independent company that produced motion pictures, formed by William Fox in 1915. It was the corporate successor and spin-off to his earlier Greater New York Film Rental Company and Box Office Attractions Film Company.

The company's first film studios were set up in Fort Lee, New Jersey, but in 1917, William Fox sent Sol M. Wurtzel to Hollywood, California to oversee the studio's new West Coast production facilities, where the climate was more hospitable for filmmaking. On July 23, 1926, the company bought the patents of the Movietone sound system for recording sound onto film.

After the Wall Street crash of 1929, William Fox lost control of the company in 1930, during a hostile takeover. Under new president Sidney Kent, the new owners merged the company with Twentieth Century Pictures to form 20th Century-Fox in 1935.