I looked at the task manager to see if anything suspicious popped up and I saw that the CPU usage shot up to 100% so I know something was wrong, but I saw nothing special other than the usual stuff I have running. I ran a boot scan, and nothing popped up, so I took an online scan at housecall.trendmicro.com and it picked up some stuff, but I still hear the audio. Every once in a while I also get pop ups that go to random websites, and I hear the mouse clicking noise in the background even when I'm not doing anything, so I'm not sure if it's the same virus.
I am not exactly sure if it connects to the internet to supply the audio, because I hear it doing the stuttering thing when you load a large video or song. It plays at completely random intervals ranging somewhere between several seconds to about an hour and a half, so even when I unplug the computer from the internet, I am just not sure if its there or not. I'm not real tech-savvy (I apologize), but I did run some anti-virus programs, searched through the computer for any suspicious programs or files, and have restarted the computer multiple times in hopes of finding the answer.