In “camera orfeo,” the artist Penelope Wehrli deals with neuronal processes of remembering, erasing and creating anew. Endoscopic images of the vocal cords of a singer while singing, the aria “Possento spirito”/”Orfeo son lo” by Claudio Monteverdi and, among other things, video images of dancers are fed into a circular system – which is controlled through the random movements of the visitors. The musical, choreographic and visual source material is constantly recombined and transformed into a kaleidoscope of images and sounds through the use of cameras that register what goes on in the exhibition and performance space. The musical structure of the aria has a loop-like character. The loops appear to be endless, but the material is limited: no sequence can be played twice in the same version. The existing material is used up by the visitors. Their movements determine the end and the beginning of the piece. Each performance is therefore unique.