MIDI Gestural control really seems to be taking off recently enabled by wireless BTLE MIDI, improvement in gesture recognition technology and advances in sensors. In this case, KMI is using a Leap Motion controller and Web MIDI to do gestural mixing.
by ANDREJ HRONCO
Leap Motion allows you to get a staggering amount of detail and data from the movement of your hands, fingers, and joints, but in this project, we're only interested in three things:
1. which hand we're using
2. what finger we're using
3. is our hand is closed to a fist
KMI has a great series of blog articles about Web MIDI. Here is a summary and links to that series.