Hello, I see that not many people visit this thread, but i am here to post a suggestion for a GBA emulator, there is currently a VisualBoy Advance source that can "can" be ported, it wont be easy, but it would be well worth it, It has all the audio information, as well as a construct, i dont know if anyone has the experence to know the addresses required to modify the PC code, but if anyone wants to know where to get the code, post and i can send it :p
Jman420