Pendaphonics consists of 8 interactive sonic pendulums with sensors measuring the x-y-z coordinates of their motion. Participants manipulate a spatialized soundscape that is directly controlled by the poitions and motions of the pendaphones. Each of the pendaphones can be raised and lowered between 1–3 meters in height, and the trajectory of a swing directly controls the sounds emanating from a loudspeaker mounted above. The pendaphones are attached to spring-retracting cords that pull them toward the ceiling, and are counter-weighted by their interaction nodes at the bottom in order to attain neutral buoyancy. Multiple channels of loudspeakers are used to spatialize the sounds being generated, enhancing the sense of physical immersion in the piece.