(Richtige Dauern, Unbegrenzt, Verbindung, Treffpunkt (two versions), Nachtmusik, Abwärts, Aufwärts, Intensität, Setz die Segel zur Sonne, Kommunion, Es, Goldstaub) Cologne Group (Alfred Alings, Harald Bojé, Rolf Gehlhaar, Johannes Fritsch, Aloys Kontarsky, Karlheinz Stockhausen); Paris Group (Carlos Roque Alsina, Jean-Pierre Drouet, Vinko Globokar, Jean-François Jenny-Clark, Michel Portal).
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The first of the pieces to be officially premiered was Es, performed in Brussels on 15 December 1968 on a concert of the Rencontre de Musique Contemporaine, by the Stockhausen Group, joined by Michel Portal, Jean-Pierre Drouet, and Jean-François Jenny-Clark.
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Setz die Segel zur Sonne followed, as part of a concert at the Théâtre National Populaire, Palais de Chaillot in Paris, on 30 May 1969 (Stockhausen 1971, 123).
Dragons' Den | Den Watts | Die Entführung aus dem Serail | Unter den Linden | Den Helder | Dragons' Den (UK) | The Den | Deutschland sucht den Superstar | Den Nationale Scene | Den | Den Haag Hollands Spoor railway station | Wu Den-yih | The Lyon's Den | Live aus Berlin | Joop van den Ende | Alphen aan den Rijn | Walter van den Broeck | The Den (television) | Samuel van den Bergh | Remi Van den Broeck | Ninja in the Dragon's Den | Michiel van den Bos | Gott erhalte Franz den Kaiser | Dragon's Den | Dirk van den Broek | Deutschland sucht den SuperStar | Banu Aus | Aus den sieben Tagen | Willemsoord, Den Helder | Schlag den Raab |
Specific works include Tony Scott's Music for Zen Meditation (1964), Karlheinz Stockhausen's Mantra (1970), Hymnen (1966–67), Stimmung (1968), and Aus den sieben Tagen (1968), Olivier Messiaen's Quartet for the End of Time (1941), and Ben Johnston, whose Visions and Spells (a realization of Vigil (1976)), requires a meditation period prior to performance.
From March to September 1970, together with nineteen other musicians, he performed works by Stockhausen (including Hymnen, Spiral, Pole, and Aus den sieben Tagen ) in the spherical auditorium of the German Pavilion at Expo '70 in Osaka, Japan. Back in Europe, he continued his association with Stockhausen, taking part in the world premieres of Sternklang (1971) and Alphabet für Liège (1972) (Stockhausen and Vetter 1996, 95 and 98).