Previously released on
LP in 1983.
Track 1 recorded in November 1976 at Henry Wood Hall, London.
Tracks 2 & 3 recorded in Paris (IRCAM), December 1981, in connection with the
Festival D'Automne (Pierre Boulez Cycle).
Rituel for orchestra in 8 groups, was composed in 1974-1975.
Éclat / Multiples was composed between 1965 and 1971 (
Multiples being unfinished at the time of recording), and requires 15 instrumentalists for
Éclat and 25 for
Multiples (same instrumentation as
Éclat with the addition of 10 violas).
According to Boulez's indications,
Multiples must not be performed alone.