Open circuit is a sound installation by Christoph Haag, Martin Rumori, Franziska Windisch and Ludwig Zeller. The team created the project while studying at the Academy of Media Arts Cologne. Open circuit consists of a labyrinth of open copper trails that cover the floor and walls of the installation space. These trails carry the electrical signals of a multichannel sound repository which become audible when wireless speakers are placed on the copper. The sound emitted by the speakers alters depending on how they are moved.