My ps3 has been having a few problems lately, the audio keeps freezing and lagging every few seconds (especially during cutscenes) and even the framerate gets kind of choppy during cutscenes. Tested this with a few games so its definitely not the game discs. Can anybody tell me whats wrong? I suspect theres something wrong with the BD drive but im not so sure.

Its a 160gb slim btw. Fairly new. Less than a year old.