Blue Heron: Si douce a oir—The Sweet Sound of Medieval Song

Preconcert talk and demonstration, 7 p.m.

The vocal ensemble Blue Heron has been acclaimed by The Boston Globe as “one of the Boston music community’s indispensables” and hailed by Alex Ross in The New Yorker for the “expressive intensity” of its interpretations.

This FREE concert is the culmination of the two-day workshop/residency, “Texture, Surface and Line: The Listener’s Experience of Late Medieval Music,” with Blue Heron and experts in medieval music including Margaret Bent, David Catalunya, Karen Desmond, Lawrence Earp, Jared Hartt, Jesse Rodin, Anne Stone and Anna Zayaruznaya.