"The second book begins with four solo recercadas (studies) for bass viol, followed by six recercadas on the bass La spagna in which agile tenor-clef counterpoints for violón are accompanied by keyboard harmonizations of the theme. Next come four recercadas (ornamented versions) of Arcadelt's four-voice madrigal O felici occhi miei for viol and keyboard, followed by four of Pierre Sandrin's four-part chanson Douce mémoire. Book 2 concludes with eight recercadas for bass viol and keyboard over passamezzo basses"--Grove music online.