For over three decades now, the American artist Maryanne Amacher has been composing works that try to get to the bottom on a structural level of the complex relationship between music and space. Her sound installation Gravity for the singuhr-sound gallery in parochial is part of her "Music for Sound Joined Rooms Series" - a series of works in which Amacher realizes architeture-based, acoustic choreographies. The installation is built from "structure borne" sound (sound propagated through walls, floors, rooms, corridors) as distinguished by acousticians from the "airborne sound" of conventional loudspeaker projection. In some episodes converging tonal colors interact as spatial presences, intricately joining adjacent rooms in the tower; in still others a particular sound shape is emphasized to animate the aural image of a distant room. Composing the sonic imaging to occur between the different spatial levels in the tower, Amacher stages the spaces themselves as elements of a resonant theatre which visitors can follow physically as well as acoustically.