I know I read somewhere a few months ago about someone having this problem but I can't find the post.

I've authored a few DVD's before using the same method and the only real problems I had were sync but am getting a handle on that one. But the last DVD I burned has an echo that goes through it from the start of the DVD and gets slightly worse towards the end.

I'm converting the audio from original MPEG-2 file to AC3 then importing it into DVD Lab. I've done this a few times before with no problems.

Anyone got a clue as to why this happens?

Thanks