Chorus assembles 72 musical greetings cards into an automated choir, driven by a software conductor. Each card is mounted on an arm controlled by muscle wire. When the software conductor sends a signal for the card/voice to sing, the wire contracts and the card opens, triggering the audio to play. Some are tinny tunes (happy birthday to you...), some are sound effects (a baby crying; clapping; an orgasm). The resulting four-minute piece is a work of audio and visual choreography.