At the very top of the cornice, the corners of the opera façade and diagonally from corner to corner of the building, the direction of hearing is created, like an echo from the other side. The sounds dimension the building in a new and easily audible way in the urban environment.

• „Diagonalklang“, Staatsoper Hannover, Sound Art, Hannover 1995

4-channel composition; electronical equipment; building structure; cable.