What system, backed by Warner Bros., relied on a separate phonograph record?
Answer
Vitaphone
Vitaphone was the proprietary system primarily supported by Warner Bros. that operated using a sound-on-disc method. In this setup, a large, separate phonograph record contained the audio track, which was required to be played precisely in sync with the corresponding motion picture being projected. Synchronization was often attempted using a clutch mechanism connecting the projector and the turntable. A major drawback of this method was its susceptibility to synchronization drift; if the projector speed varied even slightly from the intended rate, the audio and video would quickly fall out of alignment, leading to distorted or mismatched sound.
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