'Drawing Sound' is an interface that allows one to create sounds by drawing or by creating shapes and shadows. It was made by appropriating a software meant to help visually impaired people to perceive their surroundings through sound. The software called 'vOICe' connects to a video camera and converts the image coming into the computer into a sound graph.
This software can be downloaded for free from: www.seeingwithsound.com
The above video shows
how the sound graph works and demonstrates the 'drawing sound' interface.