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Cinematography. Common to more than one film gauge. Sound -- Specification for positions and width dimensions of recording and reproducing head gaps for three-, four- or six-track magnetic sound records on 35 mm and single-track on 17.5 mm motion-picture film containing no picture
This International Standard specifies the location and dimensions of *head gaps* for recording three-, four-, or six-track magnetic sound records on 35 mm (perforated in accordance with ISO 491), and one single-track record on 17.5 mm motion-picture film.
It also specifies the assignment of records to the various tracks on the magnetic coating on the film in relation to the direction of film travel.
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