When I listen to a song for the first time, I pick up bits and pieces of the melody and harmony, as well as bits and pieces of the meaning conveyed by the words spoken by the singer. Although I can immediately grasp the overall coherence of the music, there are times when the text initially resists this ordering; it is then primarily a collection of meanings and images, and sometimes remains at this stage. I particularly appreciate this feeling of signified disorder, and poetic writing seems perfectly suited to convey this impression.
That's why, when I write music, I need a poem more than a text. And the literary corpus offers me a garden from which I can pick verses and transform them into songs. So the inclusion of poetry in my compositions is not a kind of homage, but a necessity: poems are as essential to my songs as the colors in nature are to the painte