40 mixed-voice, Boulder, CO-based ensemble Ars Nova, specializing in a cappella music of the Renaissance and the 20th and 21st centuries, bring us another strikingly different collection. The 17 tunes begin with Wm. Albright's 5-part "Chichester Mass," 4 by Arvo Part," "Prayer after the Kanon," "Bogoroditse Djevo," "Summa" and "Solfeggio;" the lovely "i thank you God" by Eric Whitacre, conductor and founder Thomas Morgan's "Two Poems of e.e. cummings, the Polyphonic "o purple finch" and "when god lets my body be;" Lars Johan Werle's 4-part "trees" and Bruce Stark's "Wind Song."