Audio in boot animations?

I was just wondering if theres anyway to put audio into boot animations?

there's been threads on it, pretty sure no one ever managed to do it though..

depends on phone

So far it does work on incredible running stock rom.
I flashed to CM 5.0.8 and now the audio dont work agian. I think the incredible has mp3 support on bootup whereas most others dont get mp3 support till booted up
if you have a stock rooted incredible it does work, I was even able to change out to whatever I wanted for mp3, but cant make it work on my moto, my freinds N1, or my other friends Mytouch fender.