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 Vicar of Vejlby (1931 film)
One year earlier, George Schnéevoigt had made the first Danish sound film of feature length, however the dialogue was spoken in Norwegian. "Præsten i Vejlby" was the first feature-length sound film with Danish dialogue. Although the public had seen short Danish "talkies" since 1923, and experienced foreign features with sound for two years, the Danish language film was unique enough to create a huge success and make the film very profitable.