The complex and subtle web uniting the subject and the world involves all our senses and today I would like to emphasize that of hearing and aural sensitivity. Maurice Merleau-Ponty spoke of this union between the subject and the world, the physical and secret links that bind the embodied subject to things. Natural perception lives with the things ; it does not set them apart to observe them. So that a certain tonality is always present, it is related to seasons, winds and rains, soils and vegetation, insects and birds, rivers and seas...