Explains the process of editing motion picture footage in double system synchronous sound motion picture production. Follows, through use of flashbacks, the step-by-step sequences from the use of a clapstick to establish synchronization cues during shooting; the use of this visual-auditory signal to re-establish synchronization for each "take" during editing; means of permanently marking these head synchronization points; to the usefulness of the gang synchronizer and means of establishing internal synchronization points. Animation is employed to illustrate maintenance of synchronization in cutting from one take to another and means of elimination of unwanted sound in the sound track.
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Indiana U Audio-Visual Center