Developer Andy Somers let us know about his AirHarp app for the Leap Motion USB motion sensor:
AirHarp is the result of a weekend hacking session with a Leap Motion dev board. Leap Motion is a highly precise and responsive motion tracking device, making it a perfect tool for expressive musical interactions.
AirHarp is being developed in C++ using my audio processing toolkit, MusKit. The source code for both projects is available at http://github.com/adamsomers.
The Leap is a small iPod sized USB peripheral that creates a 3D interaction space of 8 cubic feet that lets you control software on your laptop or desktop computer. According to Leap Motion, it’s 200x more sensitive than existing devices. This allows for much more precise control, as demonstrated in the AirHarp video.
The Leap is under development and is available for pre-order for $70.