So I was playing the game one day, with the Late Night expansion running, and I noticed a song in the Hip Hop section of the music playlist had suddenly raised in pitch. It's not really a big deal, but I would kind of like it to revert back to the original pitch it was at. Does anyone know how to fix this?

I second that there is a problem with sound. I don't play with music on, so I don't deal with exact problem as yours. However, I do notice sounds from computer game or TV suddenly raise to full volume even I tried to move far away (it is supposed to get softer, especially through a wall).

What is your sound quality setting at? I feel that I have more of this problem when I don't set my sound quality to High.