Now here’s a smart idea. The InkQuencer is a special kind of step-sequencer that detects camera input and plays back music based on the information it recieves. In the above example it is using the iSight camera on a Macbook. So one can simply draw a pattern on paper and hold it up to the camera and
wherever it detects a black/dark pixel, sound is played. Quite dorky, quite ingenious. More info here.
-Via Sebastian Thielke