Line 6  Midi Mobilizer II MIDI Mobilizer II is compatible with GarageBand for iPad and other music apps Works with iPod touch (3rd and 4th generations), iPhone 4, iPhone 3GS, iPad 2 and iPad From the creators of the original MIDI interface for iPhone Compatible with CoreMIDI, the new standard for iOS MIDI apps Ideal for performing, recording, rehearsing, and inspiration capture