Getting Started:
From the home screen, hit the “Play” button to launch the fretboard. You should see four large buttons, or “frets.” If you’re a lefty, just flip the phone over and hold it in your left hand: the fretboard will flip automatically. Press your finger down on one of the fret buttons and it will light up.
Touching the screen only allows you to select the active chord. To actually play Air Guitar, you need to strum the entire device. Holding your iPhone or iPod touch perpendicular to the ground, pump your hand straight up and down. The harder you strum, the louder the sound.