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.
George Groves (sound engineer)
George Robert Groves (13 December 1901 – 4 September 1976) was a film sound pioneer who played a significant role in developing the technology that brought sound to the silent screen. He is also credited as being Hollywood's first ‘sound man’; he was the recording engineer on the seminal Al Jolson picture, "The Jazz Singer" (1927), as well as many other early talkies. In a career with Warner Brothers that spanned 46 years, he rose to become their Director of Sound and won two Academy Awards.