MUSIC

Reprising a highlight of the 2011 Tanglewood season, English conductor Bramwell Tovey, the BSO, a distinguished cast of soloists-headlined by Alfred Walker and Laquita Mitchell in the title roles-and the Tanglewood Festival Chorus present concert performances of George Gershwin's great American masterpiece, the blues-and-jazz-inflected Porgy and Bess. Described by the composer as an "American folk opera," Porgy and Bess premiered on Broadway in 1935 and only slowly gained traction in the traditional world of opera. Three quarters of a century later, it has assumed its rightful place among the greatest works of America's music.