Midi Mandala is a wireless Midi controller for iPod/Touch, iPhone, and iPad.
Previously, Intelligent Gadget's Mandala Music app first introduced the idea of using a circular arrangement of control pads to generate music. The user selects a musical scale that is mapped to the mandala. The lowest note is in the center, followed in increasing pitch from the top, alternating back and forth, down to the bottom. Compared to a square grouping of control pads, or even a keyboard on smaller devices like an iPhone or iPod, the circular arrangement is much easier to play. In fact by mapping a scale to the control pads there are, in effect, no wrong notes.
Where Mandala Music uses an internal FM synthesizer to generate sound, Midi Mandala lets you play Midi synths using the same circular control concept. 16 presets allow you to save your own custom settings.