Thus, the period of classical Hollywood film-or what is often called the “Studio Era” or the “Golden Age of Hollywood Cinema”-encompasses the radically different sound practices of live performance and recorded sound.
Performance practices with respect to sound and music remained quite diverse until the introduction of recorded sound (which happened first in newsreels and shorts, then moved to feature films by 19), the rapid development of sound technology in the period 1927–1932 (the latter date being when reliable post-production re-recording became possible), and the establishment of a consistent soundtrack aesthetic (between 19). Industry consolidation favored efficient large-scale production practices. Theater programs focused on full-length narrative feature films along with secondary one-to-two-reel films such as newsreels, comedy shorts, travelogues, and (by the late 1920s) cartoons.
Commercial film production in the United States developed rapidly after World War I.
