Speaking of which, jerome96114 on youtube (maybe he has an account here too) recently made a video of him playing To Realize's melody on a real ocarina. 
Here it is!
[...]
d00d! 
It'z epik!
Thanks
While some of his notes sounded a bit iffy, that is still epic. I've never actually heard a real ocarina before, that's pretty cool!
Well that's because I didn't have any notes or sheet-music - so I had to try to repeat "freely" what I've heard during playing the game
BTW.: The ocarina I played in that video is one of
Sonbird Ocarina, - but there are also other Brands like STL, Hind, Mountain Ocarina, Maparam, Musik Plaschke, Focalink or TNG
If you want to see videos of REALLY good ocarina players, I would suggest to visit the channels of
Ocarinadiva,
Docjazz4, or
Kissing 88That really awesome. Like it a lot. 
I did some research and found out that this guy is a member of a German RPG Maker forum. Will contact him. :>
Thanks again
