Sound City
Suspended from the ceiling by two springs and equipped with an oscillating weight fixed inside its body, a Sound City loudspeaker shakes in a disorderly manner in space. The music it plays reacts directly to the movements as if the musicians were inside the loudspeaker and trying in vain to adapt their playing to the turbulences. The originality of the movements comes from the pulsations and interferences produced by the interaction of two coupled harmonic oscillators (the spring and the pendulum) not having the same natural frequency. The two pneumatic jacks to which the springs are attached control the amplitude of the swings.