Patrick OTTO, Writings of Luciano Berio's Opus number zoo: a compositional process

Luciano Berio's Opus number zoo, a short and humoristic piece, presents a singular history: uncompleted instrumental quartet enriched with a speaking voice (Cathy Berberian's poetry) in 1951, wood quintet in which the musicians must also declaim a text of Rhoda Levine in 1970. A compositional process -- superposition and overlapping of musical elements -- is perpetuated. Each version appears as a punctual fixation. This evolution reveals the different musical contexts of the time and shows above all the composer's independence and originality.