Improvisation I, Nr. 2 aus "Pli selon pli"

"Improvisation I sur Mallarmé" was published in 1958 in a version for chamber ensemble and is a work that is often played alone or combined with "Improvisation II". Boulez later included these pieces in the cycle "Pli selon pli", leaving "Improvisation II" unchanged, but giving " Improvisation I" a version for orchestra. The present score represents this version for orchestra, which is only used in performances of the complete work "Pli selon pli". "Pli selon pli" consists of the movements Don - Improvisation I, II, III - Tombeau.