Example 17. Section a of Éclat. Background structural tone D♭3 and E♭3 are common tones that appear within each figure and are given emphasis in the sketches and musical setting (sketch material from Mappe G, Dossier 4b,6 (582–564) and Mappe G, Dossier 4a, 1 (582–516)). Pierre Boulez Collection. Paul Sacher Foundation.