“Pendulum Choir” is an original choral piece for 9 A Cappella voices and 18 hydraulic jacks. The choir stands on tilting platforms, constituting a living, sonorous body. That body expresses itself through various physical states. Its plasticity varies at the mercy of its sonority. It varies between abstract sounds, repetitive sounds, and lyrical or narrative sounds. The bodies of the singers and their voices play with and against gravity. They brush and avoid each other creating subtle vocal polyphonies. Or, supported by electronic sounds, they break their cohesion and burst into lyrical flight or fold up into an obsessional and dark ritual. The organ travels from life to death in a robotic allegory, where the technological complexity and the lyricism of the moving bodies combine into a work with Promethean accents.