ga-p35-dq6 audio playback problem

Hi,

I have the GA-P35-DQ6 motherboard, all set up and everything installed, being going good for a week, but last night when playing music on it the sound is all distorted. I have tried speakers and headphones, still the same thing. I have burnt out a audio cd and played it in my hi-fi and its ok, so its the PC that is causing the problem. All the enviormentals for the audio device manager for the Realtek Audio are set to none, and everything is installed. Just wondering has anyone have the same problem and a quick solution?

Thanks in advance