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.
I work for a living, but I don't necessarily live for a working.