Secret Ocarina Stuff:  The Ocarina's button layout is the same as a real Ocarina!  The Z trigger simulates the bottom hole.  Try holding down the Z trigger while playing a note and you'll hear the note changes just like it would on a real Ocarina!  Also, if you push the control stick around while playing the ocarina you'll change the pitch and modulation, simulating the same effect if you changed how you were blowing into a real ocarina.  Cool huh?

Song keys:
CL=C left, CR = C right, CD = C down, CU = C up, A=A

The songs of the Ocarina:

Zelda's Lullaby
CL,CU,CR,CL,CU,CR
Used all over the place to show you are a royal messenger.  Play whenever you see a Triforce symbol.  When all else fails, try playing this song.  Also if you play this song near one of those rocks that tells you the time (they're called gossip rocks) you'll be rewarded with a life-giving fairy. Taught to you by Impa after meeting Zelda for the first time.

Epona's Song
CU,CL,CR,CU,CL,CR
Used to tame and summon Epona the horse.  Also if used next to a cow you will get some milk. Learn from Malon in Lon Lon Ranch after meeting Zelda.

Saria's Song
CD,CR,CL,CD,CR,CL
Used to contact Saria, talk to Navi, or open some secrets related to forests.  Also used to make the King of the Goron's dance and be happy. Learn from Saria in the Sacred Forest Meadow in the lost woods.  To get to the meadow, from the entrance of the Lost Woods, listen to when the music is loudest and go that direction or  the path is R,L,R,L,F,L,R (L=Left, R=Right, F=Forward).

Song of the Sun
CR,CD,CU,CR,CD,CU
Used to change night to day and day to night at any time!  Also freezes the undead zombies and mummies. Go to the Kakariko Graveyard at night and go to the large gravestone in the back.  Check the two gravestones on either side of it and fight the Poe brothers.  Once they are defeated, play Zelda's Lullaby to open the Royal Tombstone.  Fall down the hole, kill all the bats to open the doorway, and go through the tomb to learn the Sun's Song.

Song of Time
CR,A,CD,CR,A,CD
Used to open the Stone Door in the Temple of Time.  Also used to move or destroy Blue blocks with the Temple of Time symbol on them. Learn from Zelda telepathically when you first get the Ocarina of Time.