Here is another wireless tool that lets you use your tablet to play music like a pro. The RemoFinger G is a wireless foot controller that pairs with your iPad to control any music app. It has a wireless range of up to 20 meters and can control 4 channels.
You can use this to select presets, stop/start recordings, and do a whole lot more without touching your device. GarageBand, AmpliTube, and other top music apps are supported. Want to turn pages without using your hands? No problem.