List of early sound feature films (1926–1929)
This is a list of early pre-recorded sound and part or full talking feature films made in the United States and Europe during the transition from silent film to sound, between 1926 and 1929. During this time a variety of recording systems were used, including sound on film formats such as Movietone and RCA Photophone, as well as sound on disc formats like Vitaphone.
Source: Wikipedia — List of early sound feature films (1926–1929) (CC BY-SA 4.0)