Two of chamber music’s finest appear for an evening featuring Mozart’s Clarinet Concerto in A Major K. 622 and Brahms’ Sonata No. 2 for Clarinet and Piano, Op. 120. Menahem Pressler, one of classical music’s most distinguished and honored pianists, was co-founder of the revered Beaux Arts Trio. He performs with two-time Grammy winner Richard Stoltzman, who is considered one of the world’s foremost clarinetists and is known for bringing the instrument to the forefront of modern classical music. UCLA Live at Royce Hall, 340 Royce Drive, Westwood. Sat., Nov. 20, 8 p.m. $38-68 ($15 for UCLA students) (310) 825-2101, www.uclalive.org.