So these guys are pretty much out of their minds. They have somehow found a way, creating their own circuitry, to harness the power of solar panels. The have created technologies that turn solar panel frequencies into a viable sound. SolarDuo has created a new and even unforeseen way to make sound. I love the idea of misusing, or re-appropriating, uncommon objects in order to make sound and these guys have carved a piece of the sun in the name of obscurity and sound.
An excerpt from their website:
Project began during a workshop in 2003 at Media Lab Helsinki when Koray Tahiroglu & Joni Lyytikainen tried to connect a solar panel directly to a sound mixer, however; they discovered that more electric components were needed to achieve different sound structures from a solar panel. They created circuits that are based on the example by Ralf Schreiber, which inspired them to create their own solar panel instruments.
http://mlab.uiah.fi/~korayt/solarduoprj.html