[QUOTE=Kerry56;2236576]MP2 usually works with NTSC, even though it isn’t “mandated” MysticEyes. There are some players that don’t like it alone though, so it is usually better to have an AC3 track as well, or simply make the audio only AC3, which is my procedure when producing my own dvds.
No need to split hairs.[/QUOTE]
From the limited details the OP provided on his no audio project:
On a NTSC version I am using MP2 audio
The logical conclusion would be the [B]out of spec[/B] MP2 audio, as “There are some players that don’t like it”.