Mark A. Cella is a distinguished fellow of film studies at San Jose State University. He’s a published writer on Cinema History and Film Theory. He has directed over 58 shorts, films and documentaries, including the award winning “Marlboro House”, which took top prize at the 2006 Slamdance short competition.
Optical Sound - Optical Sound is the system used by a projector to play back sound from a film print. The sound is exposed onto the film as a clear modulating line against black. It corresponds to the moduations of the sound. The projector reads the track by passing it between the exciter lamp a light-sensitive photo-electric cell which generates a voltage that is amplified and fed into a speaker
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