How about this instrument?
http://www.youtube.com/watch?v=nJYho56INKU

See the Wii equivalent
http://www.youtube.com/watch?v=wINCstV50HA

Anyway, I agree with Kishiro Diablo, they should include a new instrument in a Zelda game - it's just as natural as having a sword... hm..

As for an axe... I am not sure about it. I wouldn't like it to be included but if they make a nice 3D model, implement it well and actually make it useful in-game - then I'm all for it.

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