Radio essays in the french tradition of radio art program « l’atelier de creation radiophonique » which mixes acoustic real space, field recordings, musical / sonic composition, studio actors and recordings. Collage/cut ups: unhierarchic use of different sounds materials and sources. Each radio piece use sound as a medium of anthropological investigation on topics of identity, genders, border, genealogies…specific work process for each radio piece: workshops, interviews with communities, scientists and / or philosophers, reenactment by actors in studio of « live situations ». Question of langage and translation: using langage as music autobiographical/biographical components mix of fiction and reality