Sounds play at random

I can't seem to figure this one out. It seems that my computer is randomly playing sounds for no reason. It's not always the same sound either. I've heard a baseball bat, a ding, a lion roar, a couple of opening bars of songs (One being Start Me Up by the Rolling Stones and the other I believe being by Ashanti), and a few other that I can't really describe.

Anyway I went through the Read & Run First thread and didn't find anything that I can tell. The requested stuff is attached.

 

The Other 3 Files

 

I don't think this is malware related, your logs don't show anything malicious so I would post this in the Software Forum.