VITAPHONE.

The vitaphone was a sound film process that was used for he fist time in 1926, and produced by Warner Bros. This was also known as the sound on disc process in films. The disc was played while the film was being presented to the viewers. Talkies used this process, one of them was The Jazz Singer. This terms derives from a Latin and Greek word, which means living and sound. Wrner Bros introduced this process with film shorts recorded inBrooklyn. It was also release of the silent film Don Juan, which also included in that time a classical musicians. According to Wikipedia, the Vitaphone worked with normal projectors that were equipped with a turnable and reproduce rwith a fader, amplifier and loudspeaker system.