This is installed in an exhibit at the Madison Children's Museum called "The Wayback Machine". It is an 8-screen video and sound synthesizer controlled by various types of levers including an old vacuum machine, a hockey puck, and a golf club. The sound is beamed through the tubes hanging from the ceiling.
The design and concept is based on the Arduino-based video synthesizer. Here is an image of some of the connections behind this:
Two Arduinos are programmed to output three digital oscillators. I am using 3 output pins for the red, green, and blue, and a separate output pin for the audio. The video lines connect to 3 pins in the VGA cable and then are distributed to multiple monitors.
Thanks to Chris Murphy who built and wired the controllers.