This DVD offers a unique insght into the rehearsal techniques of one of the leading composers-conductors of the 20th Century. In an extensive interview, Boulez discusses two of the the key questions faced by all conductors. Firstly, to what extent does a conductor bear responsibilty for the overall sound and balance of an orchestra. Secondly, how is it possible to influence the performance of a truly great orchestra - sich as the Vienna Philharmonic. In a seperate interview held in Alban Berg's former apartment in Vienna, the conductor speaks of his master of the "New Viennesse School" whose work he values so highly and the origins of his own personal work "Notations", created in 1945.