1995-1996; 15 Instruments: 6 woordwinds, 5 brass, 2 percussions, 2 pianos
Flute, clarinet, violin, cello, piano; UA: 3/8/1998, Darmstadt, Phorminx Ensemble
2012/13; Piano Quintet
1964-1965; 2 Pianos, 4 percussionists, conductor; UA: 27/9/1966, , Percussion-Ensemble Radio Hilversum; Chaia Gerstein + Reinbert de Leeuw, piano; Cond.: Konrad Boehmer
Tape (4 tracks, at Institute of Sonology, Royal Conservatory, The Hague), 4 percussionists, 2 piano's, 3 (pop!-) singers, conductor; UA: 10/20/1984, Donaueschinger Musiktage, (Slagwerkgroep Den Haag; Gunilde Cramer + Yukiko Sugawara, piano, Jan Hendriks, Ernst Jansz + Henny Vrienten, voices; Cond.: Konrad Boehmer)
Flute, clarinet, vibraphone, piano, violin, cello; UA: 25/8/1991, Alte Oper Frankfurt, (Ensemble Köln; Dir.: Robert HP Platz)
Flute, clarinet, violin, cello, piano; UA: 14/10/1998, Gewandhaus Leipzig, (Ensemble Avantgarde, Steffen Schleiermacher)
E. Horn, clarinet, bass-clarinet, bassoon, horn, trombone, 2 pianos; UA: 13/2/1963, Paris, Théâtre Odéon, 'Domaine Musical', Cond.: Konrad Boehmer
Soprano & piano; text: Edwin Hoernle
1975; Solo soprano, solo piano and large chamber ensemble (woodwinds, brass, guitars, 4 strings); UA: 28/11/1976, Concertgebouw Amsterdam, Nederlands Blazers Ensemble; Lucia Meeuwsen, soprano; Geoffrey Madge, piano; Cond.: Lucas Vis
Voice and piano. Text: Johannes Rist; UA: 10/5/1987, Houston, Lieuwe Visser, Baß; Robert Nasveld, Klavier
Text: Valgeir Gudjonsson; Voice and piano; UA: 30/9/1989, Reykjavik, Jóhanna Thórhallsdóttir, Sopran; Thóra Frída Sæmundsdóttir, piano (TV-production Icelandic Radio/TV)
Text: Jan Boerstoel. Voice and piano; UA: 18/3/1994, De Ijsbreker - Amsterdam, Thea van der Putten, Sopran; Henk Ekkel, Klavier
Soprano & piano; UA: 27/8/2000, "Flora Concerts 2000" Hortus Botanicus - Leiden; Djoke Winkler Prins, voice; Jan Spreij, piano
Text: Albert Ostermaier; 5 female voices, piano & percussion instruments (played by the singers); UA: Wiesbaden, 26.10.2003, Ensemble Belcanto
2008-2009; Choir S-A-T-B + 2 percussions +2 piano's; based on a text by Albert Ostermaier.
Organ; UA: 31/3/2007 (Barcelona, Catedral Santa Maria del Mar), Jordi Armengol Puig (organ)