Boulez Répons

I really like Boulez later compositions, such as Répons (it would be nice to hear it in surround sound, as it should be).

One of the things that strikes me is the way he "harmonize" the phrases, especially the ones in woodwind. I can not figure out how he do it, and I do not have the score. It sounds totally unique.

Does anyone know anything about how he created this piece?

Interesting. I read somewhere that he use (his earlier) serial technique but more freely. Also quasi-minimalsim was mentioned. A wild guess would be that his repetitions of phrases would be the minimalism elements.

You say sets or pitch collections, is that set theory (Allen Forte)?

All I have found is some short articles and program notes from performances. They are not detailed enough for me to be able to experiment. I do not know how to get my hands on the score, if it is even possible.

Actually it struck my mind that the unique harmonizing that I experience maybe is not all due to intervals, but also due to the seamlessly integrated electronics of the piece.

I have contacted the publisher, but I am worried about what this will cost. Maybe I could use my money better by buying a book with analyses of Boulez.