Nintendo has revealed that The Legend of Zelda: Spirit Tracks will include sections where you play the DS like a woodwind instrument.
During these Spirit Pipe bits, you blow on the DS microphone and press the screen to adjust pitch.
Nintendo tells us the Spirit Pipe plays an "essential role" in Zelda: Spirit Tracks, just as the conductor's baton did in Zelda: Wind Waker and the flute did in Zelda: Ocarina of Time.
In Spirit Tracks you'll need to seek out guardians and recreate their songs before you can uncover the path to temples and go their on your fancy train. That's the same fancy train that's upgradable, and the same train upon which Zelda and Link will work together.
Zelda: Spirit Tracks will be released here on 11th December. Our gamepage below has all the scoops so far.