SMPTE ST 217 – Motion-Picture Film (70-mm) – Striped Release Prints – Recorded Characteristic of Magnetic Audio Records
This standard specifies the recorded characteristic of magnetic audio records on 70-mm striped motion-picture release prints, when reproduced at 120 perforations per second (approximately 112 ft [34 m] per minute or 22.4 in [569 mm] per second) which is 24 frames (5 perforations each) per second.
