1 composed 1962; recorded in Baden-Baden at Hans Rosbaud Studio on 4.7.2003 2 composed 1963; recorded in Baden-Baden at Hans Rosbaud Studio on 4.7.2003 3 composed 1964; recorded at Studio für elektronische Musik der WDR in 1964 4 composed 1965; recorded in Köln at Funkhaus Kleiner Sendesaal on 26.1.1967 5 composed 1966; recorded in Düsseldorf at Robert-Schumann-Saal on 12.-14.2.1968 1 and 2 are co-productions of Kunststiftung NRW and Westdeutschen Rundfunks Köln 3 to 5 are productions of Westdeutschen Rundfunks Köln 12-page booklet includes notes in German and English