COUNTY

The lunchtime concert series hosted by the Butler County Symphony Association features the NKC Trio of flute, violin and cello at noon Wednesday at the symphony office, 259 S. Main St. Admission is free. The concerts also are broadcast in Diamond Park.

Music in the Courtyard series is scheduled to host Tony and Friends of God, Christian music, at 2 p.m. Sept. 17 at the Butler Public Library, 218 N. McKean St. Call 724-287-1715.

REGION

Hartwood Acres’ outdoor amphitheater off Middle Road in Hampton Township hosts Billy Porter with pop/soul/Broadway music at 7:30 p.m. Sunday. Admission is free.