Paper circuits have two mirrored sides, printed adjacent, with a fold line in the middle. A piece of card moistened with glue is inserted between the folded sides. The top side indicates where to pierce by needle and where to then thread components, such as resistors, capacitors, and chips. On the underside, lines trace how to weave the component leads together for soldering. It is a quick way to craft a sketch of a circuit, but it also serves as a platform for studying crossed or circuit-bent nodes. Component connections form metallic islands, usually kept insulated from each other. The paper leaks some electrons between these islands, which may influence the purity of electronic sounds. Another unusual design implication of paper circuits arises from the organic nature of the paper, which spreads electronic influence among nodes. The “official” circuit can be described in the schematic, but, once built, the paper introduces many unofficial connections between each of the nodes.