Here's my problem -

I've got a tv show thats around 350MB saved as a .avi Unfortunately the sound did not work but after searching this forum I found that it could be a .AC3 file so I ripped the audio using Virtualdub, re-named it to a .AC3 file then converted it to a .wav using AC3Fix. This seemed to work as I can now play the sound on it's own. However the WAV is now around 550MB and TMPGEnc is struggling to use this as the audio source for my tv show.

Should the .wav be smaller or should I compress it ??

Help !!