I've been making dvds out of avis for ages now and never had this problem until today. i convert the avi to .m2v and wav with tmpgenc. i test the encoded wav fil and it plays fine. I use tmpenc dvd author to create the vob files then i test the vob files with windvd and there is no sound! i tried burning a dvd and there was no sound. I tried uninstalling dvd author and reinstalling and the same problem occurs. I tried a number of different authoring programmes and all of them made the vob files have no sound. This is most strange because just yesterday i made two movies just fine and the files come out of TmpgEnc just fine. Why would my computer suddenly decide not to put the sound in the vob files?! Thanks