In the 1st work: various performers; Reinbert de Leeuw, conductor. In the 2d work: Niederländisches Bläserensemble, with assisting instrumentalists; Robert de Leeuw, conductor. In the 3d-4th works: Vera Beths, violin; Reinbert de Leeuw, piano
The 1st work is for 4 pianos, ensemble of percussion instruments, recording of an airplane engine, and 2 doorbells; originally for 8 pianos and a player piano. The 2d work is for chamber orchestra.
Program notes in German by R. Fuhrmann, with English translation by F.A. Bishop and French translation by J. Fournier, and notes on the performers in German, English, and French on container.