Check out this great video iPhonedo posted to YouTube where he (re)creates the theme song for TV smash hit Game of Thrones. He uses the new Chinese instruments Apple added to GarageBand to do it, and part of the video includes instructions for enabling the new instruments on non-Chinese language devices. Those instruments aren't authentic to the actual theme song, but they sound great and it's a solid demonstration of just how much you can do on GarageBand on iPad.
Check It Out: Game of Thrones - Theme Song Created in GarageBand (4K Video)