Violinist Kev Marcus and violist Wil B. form an instrumental hip-hop duo from Florida called Black Violin. Both men are classically trained musicians who favor a portmanteau of beats, elegant bars and musical passages. The resulting sound has a good amount of spectacle to it but never gets lost in kitsch or mired in novelty, and the group is very popular both in the studio and on stage. Rounding out its touring band are drummer Nat Stokes and DJ SPS. Hear them all at the Arkley Center for the Performing Arts at 7 p.m. ($39, $15 students).