This is funny one, when using any kind of media player the sound distorts when there is any visual movement on-screen. This only happens with nvidia graphics cards as I tried it with an Ati and it was fine. I have tried several different nvidia cards and it is just the same. I have tried a different sound card and every driver known to man. Its most apparent when using windows media player with the visuals on, if you drop it to the taskbar the sound clears up. The operating system is XP Pro on a Tiny PC with a PIII 733 processor.