Jean-Jacques Birgé invited 28 improvising musicians to the studio to perform in duos and trios, the theme for each of the 22 recordings chosen just before each recording, with noted performers including Birgé himself, Sophie Bernado, Pascal Contet, Julien Desprez, Jean-Brice Godet, Alexandra Grimal, Sylvain Kassap, Edward Perraud, Eve Risser, &c.