Rode Ixy. Capturing high-quality audio with your iPhone or iPad without additional equipment is pretty much impossible. If you need to record crisp video voiceover, classic quotes from your buffoon of a boss, or even organize blackmail that will stand up to courtroom scrutiny, this 24-bit stereo microphone designed specifically for your iPhone & iPad is what you’ll want. $199
Make your iPad to an Audio Interface with the Alesis iO Dock - The Alesis iO Dock is a professional, high-class Audio-Interface that is patented and considered as the first device that enables anyone with an iPad to create, produce and perform music with virtually any pro audio gear or instruments. More Info / Available here: http://www.recordcase.de/cgi-bin/shop/lshop.cgi?pid=Google-Ehlen=suche=alesis+io+dock=en
Description With Audiobus, the revolutionary new inter-app audio routing system, you can connect your Audiobus-compatible music apps together, just like virtual cables. With a simple and clean interface, easily connect the output of one Audiobus-compatible app into the input of another. Use Audiobus to play a synthesizer live into a looper or multi-track recorder, or use one app to manipulate the live output of another.