These devices can be connected to the two MIDI DIN ports, or to the USB MIDI host port on the back. You can route MIDI just as easily as you route audio, either between computers, or to and from any connected MIDI devices - drum machines, keyboards and so on. It’s really confusing to start with, but after a while you’ll come to like it. You simply click on a node to connect them.
For instance, its Audio Patchbay shows a matrix of all the physical and virtual inputs and outputs. It looks like something out of a nightmare about Windows 95, but once you get used to its sparse, spreadsheetlike interface, you’ll find it very powerful. To achieve all this goodness, you need to use the iConfig app.
Thus equipped, you can record podcasts on just an iPhone, or record YouTube videos, or even record iOS GarageBand’s amazing virtual instruments into another app. This lets you capture the main audio output, which could be Skype or FaceTime, and then loop it back into the iPad for recording. How about another example, this time using only the iPad? The iConnectAudio4+ can route an audio stream from the iPad, and back to the same iPad.