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.
Roaring Twenties
In 1928, the film studios Famous Players-Lasky (later known as Paramount Pictures), First National Pictures, Metro-Goldwyn-Mayer, and Universal Studios signed an agreement with Electrical Research Products Inc. (ERPI) for the conversion of production facilities and theaters for sound film. Initially, all ERPI-wired theaters were made Vitaphone-compatible; most were equipped to project Movietone reels as well. Also in 1928, Radio Corporation of America (RCA) marketed a new sound system, the RCA Photophone system. RCA offered the rights to its system to the subsidiary RKO Pictures. Warner Bros. continued releasing a few films with live dialogue, though only in a few scenes. It finally released "Lights of New York" (1928), the first all-talking full-length feature film. The animated short film "Dinner Time" (1928) by the Van Beuren Studios was among the first animated sound films. It was followed a few months later by the animated short film "Steamboat Willie" (1928), the first sound film by the Walt Disney Animation Studios. It was the first commercially successful animated short film and introduced the character Mickey Mouse."Steamboat Willie" was the first cartoon to feature a fully post-produced soundtrack, which distinguished it from earlier sound cartoons. It became the most popular cartoon of its day.