June 1-Aug. 31, Fridays, 12:30 p.m. Free. Central Library in Copley Square. 617-536-5400, bpl.org.
Theres no shortage of diversity in this years lineup. The free series kicks off on June 1 with the Revolutionary Snake Ensemble (pictured), a local outfit with a potent take on New Orleans second-line brass band music.
Playing: The Greater Boston Asian American Youth Symphony (June 22), Lucia Stavros (June 29), Atlas Soul (Aug. 10), and Ali Amr (Aug. 17).