This video takes a look at using the Line 6 Sonic Port to record guitar into Garageband.
via Line 6 Movies:
Sonic Port gives you best-in-class audio quality and inspiring guitar tones on your iOS device. You can jam with the tones of your favorite artists, connect keyboards and speakers to create your mobile recording studio, or plug into your amp and play live. It’s perfect for GarageBand, Jammit, Line 6 Mobile POD and other CoreAudio apps.