I wanted to avoid the ethnomusicological approach, or creating background music. So I conceived a sort of toolbox containing musical elements - orchestral and electronic - intended to recreate or evoke the timbre of natural sounds, to which I added sounds from the environment, and finally ethnic sources (voices, songs, and instruments) from the sound archives of the Ethnography Museum of Geneva (MEG). I approached the Amazon with respect, in a poetic and impressionistic way. I chose the vocal and sound elements in their evocative dimension, rather than trying to be faithful to a particular ethnic group. It seemed interesting to me to fantasise the forest. It carries with it a powerful imagination; for both Westerners and Amerindians. This music also evokes a form of nomadism, as if sounds appear and disappear during a migration. It was necessary to go back to the principles of orchestration of the sounds of nature, to work from sounds which follow one another randomly, but which can compose a harmony or a dissonance. And as in any symphony, the work has moments of clarity or tension.