The Grammy-winning Turtle Island Quartet returns for a second consecutive season, joining forces this time with the Brazilian guitarists Sergio and Odair Assad for a program of string music drawn from traditions around the world. Performing as separate ensembles as well as a combined sextet, the groups share a profoundly inclusive view of chamber music, performing arrangements of jazz, folk, and world music alongside original compositions and contemporary classical repertoire with easy fluency and a fiery groove.