Graphite Music Sequencer

I'm an idi0t. Yes, it's tr00.

I was playing with a similar concept in early Jan 2008, but apparently Caleb Coppock already made this absofrikking beautiful graphite sequencer on which you can compose symphonies with just a paper and pencil:

Graphite conducts electricity. Two wires brush against the surface of a paper disk as it spins. The wires are connected to a simple electronic tone generator. When a line of graphite is drawn across the disk, connecting the two wires, a tone is heard. The quality of the line effects the sound. For example, if the line is thick, allowing more current to pass over it, a lower tone is heard.

I'd also like to point out that the actual gramophone circuitry and hardware is simply being used as a rotor here, it has no role in the processing or amplification of the audio.