Hout (Wood) was written for Loos at the request of Dirk Simons. Although the whole work is in principle a strict canon, the successive voices are so close together that it is more like a unison melody with ramifications.
Ramifications and branches are the same word in Dutch. This especially refers to the branches of a tree, so the use of wooden instruments - marimba and woodblocks - help explain the title of the work.
This programme note can be reproduced free of charge in concert programmes with a credit to the composer
“Andriessen’s quartet exuded raw, tough, aggressive, immensely satisfying energy.” New York Times