Maximilian Marcoll, electronics. Hannes Galette Seidl, electronics. The piece 'Ian W. Coel' is built around the video installation 'MSTM Wall' (Short Time Memory Wall) by british media artist Ian W. Coel (*1952) from 1988. 'STM Wall&rduo' is a video wall, equiped with cameras and set up in a public space, taking pictures of its surrounding in front and behind the wall and displaying these pictures on its video screens. Newer pictures are drawn on top of older ones, which are still visible. So, older pictures fade away and newer pictures are always bright and clear. A stereo microphone or two mono microphones are placed outside the room, focussing the street. Some time before the performance, we make recordings of the performance space itself and of the street in front of the performance space (with people crossing, cars passing etc.). The recordings will then be edited after a predefined structure to be included in the piece. The piece 'Karl Ortmann' pays homage to the German cartographer from Ilmenau (*1817 -  1879). His life's work consisted of finding a way to illustrate social structures of cities within the context of maps. Our piece is exclusively made of sounds of the city of Karlsruhe (southern Germany), recorded during one week in September 2005.