ADX encoder

you need to use DC Movie Creator to convert wav to adx, the program and tutorial should be on . I've tried it and it works well. If you're trying to change the music from a recently released game, you have to make it a loopable adx file, and use adxencoder. I've never tested adxencoder so i don't know how good it is.
Ahh, what an idiot! I forgot about DC movie creator!

But I found adxencoder, it worked fine with the music I encoded.