Like with the Alexander Technique [see previous post], it is not necessary to do much with sound, only establish the conditions for it to do what it must. The more one interferes with these processes, the less freedom. Artistic work deals with the establishing of these conditions. It's an enormous -seems almost impossible- labor which is the sum of skills, perception, intelligence, intuition, and sensitivity.
Music knows very little about this. Or better said, we know almost nothing about this other music. It's like the dark side of the moon, and there aren't many who'd like to step in. Most would rather have certainty (with an intervalic syntax, for instance) and it's understandable, it's a safe place. There's a popular saying: "No one said life was easy." No one said art is.