15-09-2019, 05:39 PM
(15-09-2019, 05:11 PM)ppppenguin Wrote: A Vitaphone 16" disc, from the late 1920s. Early talkies were done this way. The discs run at 33rpm and play from the inside out. A single disc matches a 20 minute standard reel of 35mm film.
If anybody is puzzled by this back to front method, the answer is simple. Shellac discs are easily damaged, particularly at the edges. By making the disc start in the centre it was easier to get the lip-sync correct at the beginning of the reel and maintain it to the end but, if the edge of the disc was damaged, lip-sync problems were confined to a short time at the end of the reel.
