Well I've been playing around with the .at3 sound files & have replaced my custom .at3 with the one from Madden 11. Only catch is that its not playing correctly & doesn't loop. It is playing slightly too fast, sounds like a chipmunk LoL It's actually not that bad.
If anyone else wants to play around with, you will need ATRAC3 codecs (ATTACHED), goldwave & any audio software that can cut mp3 length to under 1 min.
I have attached the .at3 that i made if anyone wants to test, to see if it sounds like a chipmunk for you too LoL