Classical Hollywood cinema
The beginning of the sound era itself is ambiguously defined. To some, it began with "The Jazz Singer", which was released in 1927 and increased box-office profits for films, as sound was introduced to feature films. To others, the era began in 1929, when the silent age had definitively ended. Most Hollywood pictures from the late 1920s to 1960s adhered closely to a genre—Western, slapstick comedy, musical, animated cartoon, and biopic (biographical picture)—and the same creative teams often worked on films made by the same studio. For instance, Cedric Gibbons and Herbert Stothart always worked on MGM films; Alfred Newman worked at Twentieth Century Fox for twenty years; Cecil B. DeMille's films were almost all made at Paramount Pictures; and director Henry King's films were mostly made for Twentieth Century Fox. Similarly, actors were mostly contract players. Film historians and critics note that it took about a decade for films to adapt to sound and return to the level of artistic quality of the silents, which it did in the late 1930s.
History of film technology
Initially, there were technical difficulties in synchronizing images with sound. However, there was still significant interest in motion pictures for films to be produced without sound. The era from the 1890s to the late 1920s, is commonly referred to as the silent era of film. To enhance the viewers' experience, silent films were commonly accompanied by live musicians and sometimes sound effects and even commentary spoken by the showman or projectionist. In most countries, intertitles came to be used to provide dialogue and narration for the film.