borisanddoris said:

So I have always felt the DVD's 5.1 track sounded better than the Blu-ray. I've ripped it but having a hard time syncing the track. Anyone want to take a crack at it or point me to a simple guide for syncing a DVD AC3 track to Blu-ray.

I'm guessing it may have to do with NTSC nonsense...

You can adjust the delay with delaycut or eac3to. You have to adjust the delay, because the movie starts at a different point than the DVD. And I believe the movie itself is 1 frame shorter or longer than the DVD version, so the AC3 will never be perfectly in sync, only almost.

If the AC3 is from a PAL DVD then there really is a problem. You can't adjust the playback speed without extracting and reencoding the AC3.

But does it worth all the trouble? It seems very unlikely to me that the AC3 would sound better.