Music in the Courtyard concerts at the Butler Public Library, 218 N. McKean St., will include the Tango fusion band Cuidado on Sept. 12 and contemporary acoustic ensemble Cloud Chamber on Oct. 10, both from 1 to 3 p.m. Call 724-287-1715.

Hartwood Acres in Hampton Township, Allegheny County, at its outdoor amphitheater off Middle Road, will have a free performance by The River City Brass Band at 7:30 p.m. Sunday. The 16th annual Allegheny County Music Festival starts at 5 p.m. Sept. 6; Rusted Root will play at 7:30 p.m. A fee is charged for the Music Festival. Visit alleghenycounty.us/parks/hwfac.aspx.Downtown Sounds Concert Series will offer free concerts at 6:30 p.m. the second and fourth Thursdays through September in Joseph D. Monteleone Youth Festival Park, Grove City. Playing tonight will be the band Mandolin Whiskey. Visit grovecityareachamber.com.