I am so happy to have found this, on Lhasa’s pages: Sonate in Urlauten of Kurt Schwitters. Dada in it’s purest form. Brilliantly performed by Jaap Blonk. For those interested: the complete score can be found at http://www.ubu.com/historical/schwitters/ursonate.html. Kurt Schwitters performing this piece himself can be downloaded at http://www.ubu.com/sound/schwitters.html. More performances at http://writing.upenn.edu/pennsound/x/Schwitters.html.