In her project Fold Loud, artist JooYoun Paek created a very neat "musical origami," where by folding a piece of paper, you'd be making electrical contacts to control the music:
Each fold is assigned to a different human vocal sound so that combinations of folds create harmonies. Users can fold multiple Fold Loud sheets together to produce a chorus of voices. Opened circuits made out of conductive fabric are visibly stitched onto the sheets of paper which creates a meta-technological aesthetic. When the sheets are folded along crease lines, a circuit is closed like a switch.