Instructions will appear when you open the app; hold the iPhone sideways and a small, chubby fretboard appears. Press one – or all four, your call – of the notes  and then move your arm up and down to “strum”. A note is also played if you strum without holding down anything on the fretboard.

As you can see, Air Guitar is actually Air Bass as well. Make that Air Guitar & Air Bass with whammy. The app compensates for the small fretboard by allowing users to customize the chord progression, either by choosing any of the 3 presets or by creating their own arrangement. As with all things that require motion you’ll learn more about the app if you see it in action, so here’s a demo from Inedible Software:

Click to View Embedded Video Clip

Fun right? Air Guitar is already available at the iTunes Store for $2 USD. Don’t have too much fun though; I’m willing to bet my brother’s guitar and amp that sooner or later someone’s going to go smash his iPhone – along with a window or a face – while pretending to be Eddie Van Halen.

[via iLounge]