Filmed in the Rhône River delta, Delta is the second part of the prelude to Cosmofonia, an ongoing film and sound project that shifts attention from a point of view to a point of hearing. Here, Paravel turns toward the inaudible sounds of the Earth: infrasonic vibrations, seismic resonances, interspecies signals, and the acoustic traces of human activity. Most of these frequencies remain beyond ordinary human perception. By rendering them audible, the work opens a new sensory field and invites audiences to encounter the environment not as scenery, but as a dense and active mesh of relations.