Composer, keyboardist and bandleader, Missy Mazzoli, joins John Schaefer to introduce selections from her new recording, “Vespers for a New Dark Age.” The work, commissioned by Carnegie Hall for the 2014 Ecstatic Music Festival, is a 30-minute suite for singers, chamber ensemble and electronics, and is built around text, both spiritual and worldly, by contemporary poet Matthew Zapruder. Mazzoli wrote for the very specific voices of sopranos Martha Cluver, Melissa Hughes and alto Virginia Warnken Kelsey, who all have a lot of experience with contemporary music but also early and Baroque music. Her ensemble Victoire provides dramatic settings while drummer Glenn Kotche (perhaps best known for his work in Wilco) propels the work percussively.  Plus, hear selections from Phil Kline’s millennial mass “John the Revelator,” written for the early/new music vocal group Lionheart and the quartet ETHEL.