My HD Radeon 7700 series card is connected thru HDMI from my Samsung HDTV. The audio thru my headphones has been working great. Then while playing Wolfestein through Steam, the audio went from full stereo to mono. Also, I noticed when running Netflix movies thru the same card the audio coming thru the headphones was washed out. Heavy reverb and barely audible voices. Anyone have a solution or know why all of sudden the audio went bad?