AT&T invented the technology that brought sound to Hollywood in the 1920s. Originally, sound for a motion picture was recorded on disks, then replayed on a large turntable that was synchronized with a film projector. Warner Brothers became the first studio to adopt the new technology, calling it "Vitaphone." In 1926, Warners Brothers premiered Don Juan, the first full length Vitaphone film, and the first with a synchronized sound track of music and audio effects. A year later, The Jazz Singer became the first feature with synchronized singing and dialog. By the early 1930s, sound-on-disk had given way to sound-on-film, which was easier to edit and exhibit. AT&T pioneered in sound-on-film as well.