What's music to some is noise to others. And that's perhaps most apparent with Ra the latest piece from the creator of an 8-bit camera gun, ::vtol::. As the artist writes in the demo's Vimeo description, the project uses a laser to scan the irregularities on the surface of a pyrite disc. The artist, real-name Dimitry Morozov, says that this disc was a gift from a mineral seller and that all of the tech present was centered around the idea of making a laser sound reader that'd "be able to produce sound from various uneven surfaces." Oh, and Morozov wanted to use the bare minimum tools to make it. What do those include? A Raspberry Pi, Arduino Nano, a homemade laser pickup, stepper motor, servo motor and a three watt mono sound system. If you want to see it in action, you're going to have to hit the Sound Museum in St. Petersburg.