Groovemaker for the iPad is a lot beefier than its iPhone/Touch counterparts--and its interface may seem intimidating compared to its little siblings--. but the concept remains the same (layer loops together to make music)l.
You can control over 8 tracks at a time, and mix tracks in real-time. After you're done, you can export your newly created song to your PC or Mac.
It comes in , and flavors that cost $10 each. A as available too.
So far, the iPad definitely shows its potential in its virtual instruments department, but what about those of us who already music production software?