Composed by erikM and performed with the Dedalus Ensemble, these pieces started through acousmographe recording of sounds outside of human hearing, transposed into notes and scored to be interpreted by musicians while immersed via headphone to mimic the sounds of cetaceans, then rearranged in the studio to create the annotated compositions heard on these carefully recorded compositions.

Improvising artists Catherine Jauniaux on voice, bird call, cupule, cazoo and eRikm on turntables, electronics, live sampling, architect lamp recorded these 17 pieces for the radio show A L'improviste by Anne Montaron for France Culture Radio.