A vast configuration consisting of fifty upright pianos forming a large circle, with an ensemble of twenty-five musicians sat at them, their backs to the audience, who are sat in the middle, 11 000 Saiten (11 000 Strings) is a fresco of a fascinating kind. Georg Friedrich Haas invites us to become enthralled, enveloped by a palette of infinite variety, like a sound-based mirror held up to the entire universe.