ASTON MAGNA The country’s oldest early-music festival opens this week with a program titled “Love and Lamentation: 17th Century Italian Monody,’’ with works by Monteverdi, Marazzoli, Rossi, and Marini. June 16 in Waltham (Brandeis University), June 18 in Great Barrington (Bard College at Simon’s Rock). 800-875-7156, www.astonmagna.org

ROCKPORT CHAMBER MUSIC FESTIVAL Coming this week to Rockport’s Shalin Liu Performance Center: the Kalichstein-Laredo-Robinson Trio (Thursday); a mostly Russian chamber evening with BSO principal bassist Edwin Barker, among others (Friday); and a recital by pianist Lise de la Salle (Saturday). 978-546-7391, www.rockportmusic.org

OPENSOUND The new-music series takes to the shores of Jamaica Pond for a performance of Dean Rosenthal’s “Stones/Water/Time/Breath.’’ Organizers have issued an open call for participants, noting that “the only equipment you will need is a bag of pebbles.’’ June 21, 7 p.m., Jamaica Pond, “north side, on the tip of the peninsula.’’ www.opensound.org JEREMY EICHLER