Sound film
The primary steps in the commercialization of sound cinema were taken in the mid- to late 1920s. At first, the sound films which included synchronized dialogue, known as "talking pictures", or "talkies", were exclusively shorts. The earliest feature-length movies with recorded sound included only music and effects. The first feature film originally presented as a talkie was "The Jazz Singer", released in October 1927. A major hit, it was made with Vitaphone, which was at the time the leading brand of sound-on-disc technology. Sound-on-film, however, would soon become the standard for talking pictures.
The Jazz Singer
While many earlier sound films had dialogue, all were short subjects. D. W. Griffith's feature "Dream Street" (1921) was shown in New York with a single singing sequence and crowd noises, using the sound-on-disc system Photokinema. The film was preceded by a program of sound shorts, including a sequence with Griffith speaking directly to the audience, but the feature itself had no talking scenes. On April 15, 1923, Lee De Forest introduced the sound-on-film system Phonofilm, which had synchronized sound and dialogue, but the sound quality was poor, and the films produced in this process were short films only.