Movietone sound system

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The Movietone sound system is a sound-on-film method of recording sound for motion pictures which guarantees synchronisation between the sound and the picture. It achieves this by recording the sound as an optical strip on the same strip of film used to record the pictures.

Movietone was invented in 1924 by Freeman Harrison Owens with his creation of the Movietone camera, and entered commercial use when William Fox of the Fox Film Corporation bought the entire system including the patents in 1926.

Fox hired Theodore Case (1888-1944) and Earl I. Sponable (1895-1977) to merge Case's sound-on-film patents with Owens's work, and with the German Tri-Ergon patents, to create the Fox Movietone system. One of the first feature films released in the Fox Movietone system was Sunrise (1927) directed by F. W. Murnau.

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