In the early twentieth century Gaumont was in the avant-garde of film technology, innovating in particular in the field of sound and colour. They were synchronizing sound on disk with motion pictures - representing a breakthrough in this area. Gaumont, with its "phonoscenes" and "filmparlants" presented a show, based in part on the world of vaudeville, song and monologue. This was a revolutionary technique of synchronization and amplification of sound. Leon Gaumont s research into sound cinema, ending at the end of the 1920s with the development of the Gaumont-Petersen-Poulsen optical...