German record label Raster-Noton presents, in celebration of its 20th anniversary and in collaboration with ZKM | Center for Art and Media Karlsruhe, the »white circle«, an acoustic-architectural space designed as an audiovisual installation. Four artists of the label have developed an exclusive audiovisual composition: Alva Noto, Byetone, Frank Bretschneider, and Kangding Ray.

Each composition presents an independent, self-contained concept of the respective artist. All works are based on the idea of ambient music, a music that wants to make tangible the acoustic space as well as the visual stimulus.