Ayako Tanaka, Cécile Grassi, Bleuenn Le Maître and Ingrid Schoenlaub make up the Psophos quartet. These talented young artists compare the quartet to a conversation between four people in which each one must affirm their personality without imposing himself. They tell us what gives their group its color, how they work, how to tune their personalities before playing any note. They also speak about their master, Paul Katz, cellist in the Cleveland Quartet.