Ensemble Intercontemporain Perspectives: Pierre Boulez Pierre Boulez is the holder of the 1999-2000 Richard and Barbara Debs Composer's Chair at Carnegie Hall. The two ensembles split the performance to the Schoenberg Suite, Op.29, as follows: Movements I and IV, Ensemble Intercontemporain; Movements II and III, Pierre Boulez Workshop Ensemble. chamber orchestra performance 1999-11-19T20:00:00