Great answer for where 29.97 came from, but I seem to be missing the explanation of 23.976 fps which is suddenly introduced as just an effect of audio post, but not how or why exactly...
Edit: more specifically, if audio was being converted to NTSC for dailies, why would it be 23.976 and not 29.97?
Edit: more specifically, if audio was being converted to NTSC for dailies, why would it be 23.976 and not 29.97?