Hi, I recently built a computer. I have an asus z77 - v Pro mobo and I have my computer hooked up to my surround sound using an optical cable. I am getting dts sound using realteks dts surround mode and I have installed fresh realtek drivers for my sound card. Once in a while, only when no sound is playing I get a speaker pop. Never when music is playing, or games. Everything is connected to a surge protector. Most of the time after stopping a video or just as I click to start the video I get the popping nose. Any answer? I have not tried using driver sweeper and re installing the sound drivers though. HDMI audio does the same thing.