Like magic.

This app is pretty darn cool. If you know a bit about music, you can feed it a song and be playing it moments later. That’s cool. It can be a little difficult sometimes to understand the timing it is showing you, like when the chord changes fall, but if you know the song you can nail it pretty quickly. Very cool. One of those types of apps you use to show people how cool your iPad is and the cool kind of stuff it can do.

Very happy with the purchase.

grimmbob about Capo - Learn Music by Ear, v2.0.2