French composer and bass viol virtuoso. Though he was one of the leading French viol players of his era, little is known of his origins or of his life. Perhaps related to the musical Caix family, he may have studied with two other important viol players in Paris, Sainte-Colombe and Marin Marais . He is known chiefly for eight published collections of pieces, six for one and two viols with basso continuo and two for transverse flute and continuo.