NEWPOLI Newpoli is an eight-member ensemble that specializes in the folk music of southern Italy. Reaching back as far as the 16th century for some of its repertoire (now, that’s old-time!), the group's intent is to highlight the folk spirit of the music it recovers. Thursday’s show celebrates the release of a new CD, “Tempo Antico.” Sept. 26, 8 p.m. Tickets: $15-$20. Oberon, Cambridge. 617-547-8300, www.americanrepertory theater.org