Working without a conductor, the intensely collaborative singers of Stile Antico have won acclaim as one of the world’s most vibrant and expressive vocal ensembles. They return to BEMF with a program that charts a course from twilight to dawn, echoing both the rhythms of church liturgy and the medieval experience of night, seductive and unsettling in equal measure. Taverner’s mighty Ave Dei patris filia, based on a chant for Matins, stands at the end of a sumptuous sequence of sacred music, chansons, and madrigals, including Allegri’s beloved Miserere, by composers from England and across Europe.