I know another boring audio sync problem but would appreciate some help

Can someone please tell me how I go about decompressing audio stream to uncompressed wav file and then recompressing with a constant bitrate enoder?
I'm getting the usual VBR warning causing 3318 ms of audio skew.
If you could give me info on a guide or a quick explanation would be even better
I've already converted the video using Tempgenc, however if i can just fix the audio to match I'd be able to author and burn
Thanks