Gabriel Bonnin is a YouTuber who developed the "Singer Sound System." This is an electric hurdy-gurdy that he powers by treading on a Singer manual sewing machine. He says that it's integrated with four microphones that allow him to manipulate the sound quality while using it.
Here he is peforming the Guns 'n' Roses classic "Sweet Child o' Mine." His channel also includes the Doctor Who theme, "Gangsta's Paradise," and "Smells Like Teen Spirit."
-via Kottke