Black Violin, The Contact Collective, 7 p.m. Aug. 15, Wind Creek Steel Stage at PNC Plaza. Black Violin is led by the classically-trained string players Wil B., viola, and Kev Marcus, violin. Joining them onstage is DJ SPS and drummer Nat Stokes. The group has collaborated with Kanye West, Aerosmith, Wu-Tang Clan, Wyclef Jean and Alicia Keys. Black Violin’s most recent album, “Take the Stairs” (2019), includes “Showoff,” “One Step” and “Impossible is Possible” and debuted at No. 1 on the Billboard Classical Chart, No 1 on the Billboard Classical Crossover Chart, No. 7 on the Billboard Top New Artists Chart and No 9 on the Billboard Hip Hop and R&B Chart. Its last album, “Stereotypes,” hit No. 1 on Billboard’s Classical Crossover chart and No. 4 on Billboard’s R&B Chart.