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.
Audio commentary
The first audio commentary was featured on the Criterion Collection release of the original "King Kong" movie, on laserdisc in December 1984. It featured film historian Ronald Haver and his first words were:
The idea for the commentary track arose in the film-to-tape transfer room when laserdisc producers, Peter Crown and Jennifer Scanlin of Romulus Productions, Inc., thrilled by Haver's incredible commentary, suggested to Bob Stein and Roger Smith that this material needed to be included on the disc. They played back the completed movie as Ron watched and ad libbed his comments.