I just bought and downloaded a bunch of video tutorials in quicktime (.mov), but to my distress they play without sound. Other videos on my computer play sound, even quicktime files I made myself got sound.
Just these downloaded files. I probably miss a codec, but how do I know which one?
My system is windows 7 final x64 and I use the standard on board sound card of my shuttle SP35P2 Pro Barebone.
The preview video of the tutorial I bought neither does play sound, probably for the same reason.