The Well-Tempered Chaos is part of a series of experiments on algorithmic composition where the random number generator is the main compositional tool. In this piece, random number generators control everything that can be heard: the timbre of the sounds obtained by additive synthesis, the notes duration and sequences, and their spatialization in B-Format. All in all, more than a hundred random number generators are used in The Well-Tempered Chaos. As the title implies, this piece uses an equal temperament and is tuned to A440.