- Source: Sound-on-disc
Sound-on-disc is a class of sound film processes using a phonograph or other disc to record or play back sound in sync with a motion picture. Early sound-on-disc systems used a mechanical interlock with the movie projector, while more recent systems use timecodes.
Examples of sound-on-disc processes
= France
=
The Chronophone (Léon Gaumont) "Filmparlants" and phonoscènes 1902–1910 (experimental), 1910–1917 (industrial)
= United States
=
Vitaphone introduced by Warner Bros. in 1926
Photokinema, short-lived system, invented by Orlando Kellum in 1921 (used by D. W. Griffith for Dream Street)
Digital Theater Systems
= United Kingdom
=
British Phototone, short-lived UK system using 12-inch discs, introduced in 1928-29 (Clue of the New Pin)
= Other
=
Systems with the film projector linked to a phonograph or cylinder phonograph, developed by Thomas Edison (Kinetophone, Kinetophonograph), Selig Polyscope, French companies such as Gaumont (Chronomégaphone, Chronophone), and Pathé, and British systems.
Film censorship
During the 1920s and early 1930s, films in the United States were subject to censorship by state and city censor boards, which often required cuts of scenes before a film would be licensed for exhibition. While films using the sound-on-film process could accommodate a patch for a requested cut with ease, a film using sound-on-disc would require an expensive retake. If the cost of compliance with a censor board was too high, the film would not be shown in that state or city.
See also
Sound film (includes history of sound film)
Sound-on-film
List of film formats
List of early sound feature films (1926–1929)
References
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