Created by Felicie Bazelaire, CoO is a string ensemble drawn from the French new music ensemble ONCEIM; CoO develops new repertoire for strings, collaborating with composers like Bertrand Denzler, who wrote this innovative composition "Arc" in two parts, a work applying unusual techniques to bowed strings, particularly lower bass tones, for fascinating results.

The 8-piece collective improvising group of Patricia Bosshard (violin), Laurent Bruttin (clarinets), Yannick Barman (trumpet), Jean-Jacques Pedretti (trombone), Vinz Vonlanthen (guitar), Dragos Tara (bass), Cyril Bondi (percussion), Christophe Berthet (sax).