By 1907, sound experimenter Georges Mendel had devised a system to assure synchronization by mechanically interlocking phonograph and projector. The film was shot to playback but amplificati... Read allBy 1907, sound experimenter Georges Mendel had devised a system to assure synchronization by mechanically interlocking phonograph and projector. The film was shot to playback but amplification of the acoustic recording remained a significant limitation. Here, M. Note of the Paris... Read allBy 1907, sound experimenter Georges Mendel had devised a system to assure synchronization by mechanically interlocking phonograph and projector. The film was shot to playback but amplification of the acoustic recording remained a significant limitation. Here, M. Note of the Paris Opera sings "La Marseillaise" in 1908.