Smule's Ocarina application: Play a flute by blowing on your iPhone!
I meant to post about this a while ago- here is a group of people playing a relaxing version of "Stairway to Heaven" on their iPhones:
"How To" Video:
Picture via Brothersoft Editor's Blog:
"- Blow into your microphone to generate music
- Hold down combinations of the holes to change your pitch
- Tilt your phone from front to back to change the vibrato depth
- Tilt your phone from side to side to change the vibrato rate"
You can connect with other Ocarina players around the world via your iPhone.
Video of Smule's Zephyr application:
Take some time and explore the other applications developed by Smule.