Peter Schat           

Peter Schat (1935-2003), Dutch composer, studied Piano with Jaap Callenbach in Utrecht and composition with Kees van Baaren. Later he become a pupil of Matyas Seiber in London. From 1960 he studied with Pierre Boulez in Basel.

Schat was convinced that the history of music was changed irreversible by the influence of Arnold Schönberg and his circle. Schönberg  wrote atonal music and propagate twelve tone music. Schönberg cut definitive through the navel string  from the uterus tonality. With the serial period, where composers controlled everything by using rows, History of Music arrived in a giant crisis. A crisis that, according to Schat, only could be solved by the Tone-clock. In spite of being megalomaniac, he was with Louis Andriessen the best composer of his generation.

The beginning of Aap verslaat de knekelgeest (Monkey subdues White Bone Demon) on YouTube

When Schat wrote this work, he had not discovered the toneclock yet. Nevertheless there are already some elements of the toneclock in this work present.

A work from 1972 called To You,

And at last a toneclock work, De Hemel (The Heaven) for orchestra,  composed in1990.