The voices of Elisabeth, Ello and Cathy. What music produces is a sound. In our 20th century technological imagination, a full-scale orchestra is like a factory of thought in which the conductor incites the performer with broad gestures to produce sounds in the right way and at the right moment, in accordance with indications in the score, which serve as a more or less comprehensible guideline. This 'Metropolis - orchestra' is nonetheless lacking in one essential component: the human being and his voice. Routine is in fact incompatible with art. The primary consequence of this attitude is to consider the human voice as a fundamental value in music, and to consider instruments its traveling companions, technical means to achieve the desired meaning.