** condition: NM/EX ** One of the very important releases on Wergo’s legendary Studio Reihe Neuer Musik series (Gyorgy Ligeti, Karlheinz Stockhausen, Luc Ferrari, Herbert Eimert, Mauricio Kagel, Folke Rabe, Bo Anders Persson, Josef Anton Riedl, etc.). Three seminal works by Christian Wolff performed by an all-star line-up: David Tudor, Frederic Rzewski, David Behrman, John Nash and Gordon Mumma and determined by chance. “They are characterized by the challenges he assigns to the performers: the responsible use of freedom.”