Instructions
Explore Papuchia and find the cluster of four houses near the center of the town. Enter the largest of the four and speak with the fortune teller inside. She tells you about a hidden stone near a "lonely tree."
Exit the house and go near the area where Zelda noticed Carben and the Sky Dwellers flying around. Find the lone palm tree in this area and stand next to it. Play the "Song of Discovery" on your Spirit Flute to reveal a Sound Stone.
Tap the Sound Stone and follow its instructions to learn the "Song of Birds." Once you have successfully learned the song, the birds flying above you will bring Carben down.