Pendulum was part of the Exhibition "Protocol" in March 2011.
The movement of a pendulum is tracked by a spiral of 64 sensors. When the pendulum passes above a sensor, a sound unique to that sensor is triggered. As the pendulum tracks to and fro, repeating sequences of notes are revealed, but these motifs are in a constant state of change. As the pendulum slows, the time gap between sound events lengthens (the sounds also become softer). As the range of the pendulum's movement decays, sound events are lost from the sequence but new sound events can also be gained as the circling movement of the pendulum contracts to include sensors closer to the centre of the spiral. The sounds heard in this incarnation of the Pendulum are of a prepared classical guitar.