Mark A. Cella is a well known film, restaurant, and lifestyle columnist for the San Jose Mercury newspaper. His column, first published in 1992 is considered a must- read in the area, with dozens of known collectors and online traders of his fine insights into movies.
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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