Dudes, I have a similar problem
I cannot get sound from any video files that have an audio encoding of MPEG Version 1 Audio
The problem just happened randomly one day as everything used to play fine.
I have tried
- uninstalling / re-installing sound drivers
- uninstalling reinstalling shark 2007 codecs
- installing most recent Klite codecs
- uninstalling reinstalling media player
- Restoring Media Library
- Playing with every setting for my sound card
- Playing with every setting in Media Player including advanced - codecs
Nothing so far has fixed the problem. Every other type of video works.
Also theres no problem at all from any other type of media player e.g. media player classic is fine
Most of my older AVI files have MPEG Version 1 Audio !! I cant use my playlists now !!
(p.s. You can tell what type of audio encoding has been used in a file by running Media Info (for Klite codec pack) or choosing Analyse Media File (Shark 2007 codec advanced settings)