Aaaahhhhh. Thanks for the explanation. On another note..... When I try to watch movies my center channel doesnt produce any sound. I am using WinDVD 3 (though I have tried 4 and didn't like it as much). I have switched to both 5.1 channels and S/PDIF in WinDVD but still no center channel. In 5.1 mode the sound from the center channel is missing, though echoes can be heard in the other channels. In S/PDIF mode the center channel is distributed to the FL and FR channels to create a virtual center channel as in 4 speaker mode. Any idea why this would be happening? The center channel works in other applications.