I just downloaded from my Sony SR-100 mpegs. To check them out on windows media. There was no sound. I played back from my camera there was sound. I went back and to some clips I did last week that I had watched on Windows media there was sound, but now when I checked there is no sound. Any suggestions on where to start checking to find out how I can trace the problem? Also I noticed that both my DVD do not play sound, when I know there is sound. That I noticed 4 days ago when I burned a DVD thought I had mucked up. When I played it on a DVD Player sound was there but not when I play on DVD. I am not sure if it's connected, but all of a sudden no sound DVD, and now know sound on Media Window player.