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    "abstract": "The purpose of this document is to define the positioning offset between the start of the picture and the start of the sound on the leaders of 35 mm release prints, so as to ensure sound/picture synchronization in projection.",
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    "abstractOriginal": "Le présent document a pour objet de définir l’écart de positionnement entre le début de l’image et le début du son sur les amorces des copies d’exploitation 35 mm ; afin d’assurer la synchronisation son/image en projection.",
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    "details": "French-language CST recommendation specifying the picture-to-sound offset on the leaders of 35 mm release prints: 20 ± ½ frames from 1 April 2007, with sound read ½ frame ahead of picture. Also asks post-production to validate sound/picture sync in a mixing auditorium with the mixer at least 7 m from the screen, to counter sync errors accumulated in digital workflows.",
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