A sound film is a motion picture with synchronized sound, or sound technologically coupled to image, as opposed to a silent film. The first known public exhibition of projected sound films took place in Paris in 1900, but decades would pass before sound motion pictures were made commercially practical. Reliable synchronization was difficult to achieve with the early sound-on-disc systems, and amplification and recording quality were also inadequate. Innovations in sound-on-film led to the first commercial screening of short motion pictures using the technology, which took place in New York City in April 1923.

The primary steps in the commercialization of sound cinema were taken in the United States in the mid- to late 1920s. At first, the sound films incorporating synchronized dialogue—known as "talking pictures", or "talkies"—were exclusively shorts; the earliest feature-length movies with recorded sound included only music and effects. The first feature film originally presented as a talkie was The Jazz Singer, released in October 1927. A major hit, it was made with Vitaphone, the leading brand of sound-on-disc technology. Sound-on-film, however, would soon become the standard for talking pictures.

Walter Scott Murch (born July 12, 1943) is an American film editor and sound designer.

Murch was born in New York City, New York, the son of Katharine (née Scott) and Canadian-born Walter Tandy Murch (1907–1967), a painter. He went to The Collegiate School, a private preparatory school in Manhattan, from 1949 to 1961. He then attended Johns Hopkins University from 1961 to 1965, graduating in Liberal Arts.

While at Hopkins, he met future director/screenwriter Matthew Robbins and cinematographer Caleb Deschanel, with whom he staged a number of happenings. In 1965, Murch and Robbins enrolled in the graduate program of the University of Southern California film school, successfully encouraging Deschanel to follow them. There all three encountered, and became friends with fellow students such as George Lucas, Hal Barwood, Robert Dalva, Willard Huyck, Don Glut and John Milius; all of them would go on to be successful filmmakers.

Murch started editing and mixing sound with Francis Ford Coppola's The Rain People (1969). Subsequently, he worked on George Lucas's THX 1138 and American Graffiti and Coppola's The Godfather before editing picture and mixing sound on Coppola's The Conversation, for which he received an Academy Award nomination in sound in 1974. Murch also mixed the sound for Coppola's The Godfather Part II which was released in 1974, the same year as The Conversation. He is most famous for his sound designing work on Apocalypse Now, for which he won his first Academy Award in 1979. In 1985 he directed his one film, Return to Oz, which he co-wrote with Gill Dennis.

Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and a long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park" (now Edison, New Jersey) by a newspaper reporter, he was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and because of that, he is often credited with the creation of the first industrial research laboratory.

Edison is the fourth most prolific inventor in history, holding 1,093 US patents in his name, as well as many patents in the United Kingdom, France, and Germany. He is credited with numerous inventions that contributed to mass communication and, in particular, telecommunications. These included a stock ticker, a mechanical vote recorder, a battery for an electric car, electrical power, recorded music and motion pictures.

Cyrano de Bergerac may refer to: