The V Motion Project is a visually powerful Kinect based musical “instrument” that was developed by multiple artists for a marketing campaign.
On the technical side they found a very creative steam punk like solution for the problem of multiple kinects interfering with each other:
Matt Tizard found a white paper and video that explained an ingenious solution: wiggle the cameras. That’s it! Normally, the Kinect projects a pattern of infrared dots into space. An infrared sensor looks to see how this pattern has been distorted, and thus the shape of any objects in front of it. When you’ve got two cameras, they get confused when they see each other’s dots. If you wiggle one of the cameras, it sees its own dots as normal but the other camera’s dots are blurred streaks it can ignore. Paul built a little battery operated wiggling device from a model car kit, and then our Kinects were the best of friends.