I ripped a few chapters of a concert on a DVD into DivX formats(4:3 ratio) with the sound going at 192kbps on mp3. The file was pretty big though. Then I ripping the same chapter into mp4 format and I get a very very similiar quality image but the sound sounds like crap compared to the avi format. but the file was pretty small compared to the avi. Is there anyway I can get the same sound quality on the mp4 the same as the avi?