The Pittsburgh Chamber Music Society presents the Brentano String Quartet in a program of Schubert's "Quartettsatz" and his String Quartet in G-Major, with Britten's String Quartet in G-Major. The concert at Carnegie Music Hall in Oakland, starts at 7:30 p.m., as do all PCMS concerts this season, a half hour earlier than in years past. $15-$35 adults; 412-624-4129.

Mezzo-soprano Marianne Cornetti gives a free master class at 7 p.m. at the Pittsburgh Opera headquarters at 2425 Liberty Ave. in the Strip. It is open to the public.

Singer-songwriter and former Houserocker Bill Toms will hold his annual Thanksgiving Benefit Concert at Cefalo's in Carnegie at 8 p.m., with proceeds going to the Greater Pittsburgh Community Food Bank. Toms will be joined by the Bill Deasy Band, Shari Richards and Tom Breiding. For details, call 412-303-3867.

Looking for something to do with the family today? Special programming has been planned at these museums:

Children's Museum of Pittsburgh presents KNOTDance performing "Fall in Love," a blustery and beautiful tale about a boy and his beloved, at 1:30 and 2:30 p.m. Free with museum admission. At 10 Children's Way, Allegheny Square, North Side (412-322-5058 or www.pittsburghkids.org).

Mattress Factory offers a full day of hands-on activities appropriate for all ages, including contemporary portraiture and model installation making. Guided tours at 1:30, 2:30 and 3:30 p.m. Free with museum admission. At 500 Sampsonia Way, North Side (412-231-3169 or www.mattress.org).

Westmoreland Museum of American Art features "Toy Stories: The Holiday Toy Exhibition," including 100 antique and modern toys from the museum collection. From noon to 4 p.m. singers and dancers from Stage Right! and the Peters Township High School Instrumental Ensemble will perform. Music, dancing, a scavenger hunt, cookies and punch round out the day. Suggested museum admission of $5, under 12 and students free. At 221 N. Main St., Greensburg (724-837-1500 or www.wmuseumaa.org).

"Suite Life: A Billy Strayhorn Birthday Bash" at 8 p.m. at the Kelly-Strayhorn Theater, 5941 Penn Ave., East Liberty. Give thanks for jazz on Thanksgiving weekend and celebrate the birthday of Billy Strayhorn -- a Pittsburgh native, a great composer, pianist, and the man responsible for many of Duke Ellington's jazz numbers, including "Take the 'A' Train." The Pittsburgh Gospel Choir, spoken word artist Vanessa German, trumpeter Sean Jones' Quintet with guest steelpan artist Phil Solomon are slated to perform. For tickets, $15 in advance, $20 at the door and $10 for students and artists, visit www.kelly-strayhorn.org or www.brownpapertickets.com.

Critics Andrew Druckenbrod and Scott Mervis talk about music on "The Beat," available exclusively at PG+, a members-only web site of the Pittsburgh Post-Gazette. Our introduction to PG+ gives you all the details.