L’Onde Souterraine is a collection of live electro-acoustic improvisations by Lea Bertucci on Bass Clarinet and Leila Bordreuil on Cello. Recorded in 2013 on two-inch magnetic tape in a large church hall,L’Onde Souterraine uses feedback to explore the possibilities of sound distortion through space. The duo weaves natural acoustic phenomena with extended techniques to create dark music that resists conventional labels and transcends traditional song structure.