The Hoketus ensemble from Amsterdam under the direction of Louis Andriessen during the concert on 17 September 1979 at the State Higher School of Music in Warsaw as part of the 23rd "Warsaw Autumn" International Festival of Contemporary Music.
The ensemble was composed of: Louis Andriessen, Cees van Zeeland, Gerard Bouwhuis, Gene Carl (piano), Huib Emmer, Jeanette Yanikian (bass guitar), Paul Koek, Luuk Nagtegaal (percussion), Patricio Wang, Renato Freyggang (Pan flutes), Albert Beltman, Mariette Rouppe (saxophones).
