Default Custom Boot Animation Help

I recently picked up an s3 and rooted it. Im currently running Cyanfox; I was able to install a custom boot animation using Rom Toolbox but now I'm trying to figure out how to put music while it boots. I'm not sure if the phone is able to play music while it boots but I remember before I flashed it, the at&t boot screen would play their jingle. If anyone can tell if its possible to have custom music, what format it needs to be in, and what folder. It would be greatly appreciated!