Hi, instead of creating a new thread, I found this one and I have the same problem. I have a little more information to offer. First of all, I noticed that the situation occurs when the fan starts getting louder. This leads me to believe that the processor is overheating even though the laptop itself does not get very hot.
I have noticed that it happens when I play Civilization V, which is a pretty significant program (as far as graphically). However, the sound distortion also occurs while I am trying to view a simple stream on a web browser (such as on Twitch.tv) and even with Netflix. I have tried multiple browsers so I know it is not an issue with that. I have also run diagnostics via the built-in HP system checks (I did every single check available, not just the system board test).
I have also been in audio-only skype conversations when this audio lag occurs. The people who I were in the call with said that I sounded exactly how I hear things, robotic and in slow motion. This tells me that it is not a problem with the speakers or headphones.
Hopefully this additional information leads to a solution to the problem. Thanks in advance.