This worked so well - and I think it would work on an even larger scale. Mine was about 30" high by 15" wide. Here's some pix: Finger paint on plexi glass -- there's aluminum foil along the edges of the plexi with resistance sensors clipped to each side -- paint to change the resistance. Here's a closer view that shows how it is set up.

Hi all! So, I was out in Missoula the first week in August and ran across a painter who was more of a performance artist. He hooked up his brushes to an amp so while he painted, he was also making a musical performance. He also had back-up from a drummer and a bass player while he painted.

Artist Jessica Rylan made an interesting sound installation that features two types of bird sounds. Here's how she describes how she made the sounds: I did it by modulating the supply voltage, a popular circuit-bending trick. One bird chirps more frequently, sometimes sounding like a seagull. The other bird sings less frequently, but it has a long graceful warble like something that likes to stay hidden deep in the forest.