I'm pretty sure it supports all of what GE supports and more! This would most likely fix the music/audio problem with Linux as well!
http://www.fmod.org/
Makslane, akr or sky, please check it out

I suppose GE would use FMod ex programmer's API, Fmod designer also provide a really easy to way to implement sounds that don't sound simple

I could try adding it into GE myself, but I rather wait until I get a little more programming under my belt, I feel like I wouldn't be able to understand how GE works just yet

Oh, I think I forgot to mention... It's completely free!!