I saw this guy playing with a small streetcorner band two weeks ago at a festival. The intrument he was playing interested me, so I took a picture of him. I forgot about it until I saw the picture again last night. Does anyone know what the instrument is, or how it works? It almost looks homemade.
It makes an electric sound, much like a primitive synthesizer. He would wave each hand over the metal plates on each side and the tone would change its intensity and pitch. It was kind of like when you hook an oscilliscope up to some speakers and play with the knobs. The sound also reminded me of someone playing a saw by bending and shaking it to change the pitch.
He would move the hand on the left up and down, while waving the hand on the right back and forth over the plate. He never touched the metal plates.
and here's a close-up:
How does it work?