Abstract: (The identity of the director in the opera performance) The Human Voice by Francis Poulenc) The work aims to detect the instruments that are the basis of staging an opera performance. Considered a sacred object, the musical score contains a lot of information the director needs to mount the proposed title. Musical dramaturgy is encoded in the heights of the notes, in the values, in the timbre colors of the instruments, in the dynamic and agogic elements, in musical themes and motifs, and more importantly, in the opera's leitmotiv system. The director's aim is not to illustrate the music, which would demonstrate the lack of inspiration and would also represent a tautological act, but to (re)create, following the data imposed by the music, a new, very personal, aesthetically interpreted universe imbued with themes, subtexts, truths, and emotions. The indissoluble link between the text and the score must be considered a way to support the director's vision, not as imprisonment in a strict and hard-to-describe world. The musical reflexivity, not accidental in the case of Poulenc, enhances the meaning of the words and provides support to the directorial concept when the correct decryption has been achieved. To better understand how one can follow the route from the text to the score and then to the performance, we will introduce the stages of the mise-en-scène of the performance The Human Voice by Francis Poulenc.