In Ocarina of Time while going through Zora's River, you'll come across a group of frogs. After playing five songs, excluding Song of Storms they'll become big. And then they'll wait you to play along with them. The notes for this second thing are:

A, C-L, C-R, C-D, C-L, C-R, C-D, A, C-D, A, C-R, C-L, A.

After completing these notes, you'll receive a Piece of Heart. For playing the Song of Storms to this group of frogs, they'll hand you over a Piece of Heart.