Music

Classical music critic’s picks

SEPTEMBERFEST

Longy’s annual festival continues Friday night with a free chamber program of works by Foss, Ibert, Tchaikovsky, and John Morrison, and concludes Saturday with an all-Schubert program. Longy School of Music of Bard College, 27 Garden St. in Cambridge. 617-876-0956, www.longy.edu

BOSTON SYMPHONY

ORCHESTRA

Itzhak Perlman leads the BSO in its season-opening allBeethoven program, conducting Symphony No. 7 and performing as soloist in the Romances Nos. 1 and 2 for violin and orchestra. 7 p.m., Saturday. Symphony Hall, 617-266-1200 or www.bso.org

BRAHMS SONATAS

Daniel Stepner (violin) and Robert Levin (piano) survey the three Brahms Violin Sonatas, with Levin performing on a period piano identical to the one owned by Brahms. 7 p.m., Sunday. Slosberg Music Center, Brandeis University. 781-736-3400, www.brandeis
.edu