TANGLEWOOD
The Boston Symphony Orchestra opens its 75th anniversary season at Tanglewood next weekend, beginning with an all-Beethoven program under the baton of Christoph von Dohnanyi (pictured). July 6.
Lenox. 617-266-1200 or www.tanglewood.org
ROCKPORT CHAMBER MUSIC
FESTIVAL
Sunday at Rockport, the Trio con Brio Copenhagen offers works by Brahms, Mendelssohn, and Per Norgard. Shalin Liu PerformanceCenter, 37 Main St., Rockport. 978-546-7391, www.rockportmusic.org