Here is a piece I wrote in 1980. It's taken notation software that long to allow me to transport it into sounds that a computer could realize. It is written in alleatoric notation and was played in 1981 by my highscholl band (I was the director of the band not a student.)
Illuvatar is named after a fictional god from the J.R. Tolkein's mythical epic The Silmarillion.This piece is an alleatoric dialogue between different sections of the band. It represents the babble of children in a world far from our own where the god, Illuvatar looks down upon his children.
Since it is alleatoric, it would sound slightly different on each real reading. I had to realize each part as if I were the performer, so it has taken me awhile.
I warn you, it is a difficult listen.
The Children of Iluvatar