Variety at Tanglewood

TANGLEWOOD Thursday, the genre-hopping Ebene Quartet returns to Ozawa Hall. Friday, in the Shed, Bramwell Toveyleads the BSO in works by Beethoven, Copland, and Barber; and Sunday, Rafael Fruhbeck de Burgos leads a performance by the Tanglewood Music Center Orchestra. On Saturday night, the Boston Pops offers an 80th birthday tribute toJohn Williams, with Jessye Norman, Yo-Yo Ma, and Gil Shaham among the special guests.Lenox, 617-266-1200, www.tanglewood.org Jeremy Eichler