I have a new 2.4 Penryn MBP and ever since I got it, I have been having issues with the audio. What happens is that I am getting crazy high pitched bleeps and bloops in between sounds. It can be a song playing through iTunes or just simply adjusting the volume via the keyboard. It doesn't matter what software is currently being used, it simply happens after every time sound comes from my computer. Just another disappointment with the new MBP's.