I'm an ocarina player, so I found this kinda interesting. You can play, and apparently hear other people play all over the world.
I don't have an iPhone though, because I'm not a fucking millionaire. You could get like nine thousand and one real 12-hole carinas for the price of an iPhone. Still, looks like you can go down an octave with this, which is cool.
http://ocarina.smule.com/
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