Louis Andriessen. Workers Union by Bang on a Can

Andriessen, Louis: Workers Union (1975) 20' for any loud-sounding group of instruments.
Composer's Notes
Workers Union was originally written for the orchestra De Volharding (Perseverance), in which I myself figured as a pianist at that time.
This piece is a combination of individual freedom and severe discipline: its rhythm is exactly fixed; the pitch, on the other hand, is indicated only approximately, on a single-lined stave.
It is difficult to play in an ensemble and to remain in step, sort of thing like organising and carrying on political action.
Louis Andriessen
(1990)
CD version. Great quality.