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.

Butler County natives Jim Pugh, who plays trombone, William Purvis, who plays french horn, and composer/conductor Stephen Heyde will join Butler County Symphony Orchestra musicians for a fundraising concert Sept. 26. The event will begin at 7:30 p.m. at the Community Alliance Church on Mercer Road. Tickets are $20 for adults and $10 for students and are available from symphony board members or at the symphony office at 259 S. Main St., Fudoli Music & Repair Center, May's Music Shoppe and Meridian Station, or at ShowClix.com.

Hartwood Acres in Hampton Township, Allegheny County, at its outdoor amphitheater off Middle Road, has the 16th annual Allegheny County Music Festival starting at 5 p.m. Sunday; 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 Sept. 10 will be the band Catro. Visit grovecity areachamber.com.Allegheny RiverStone Center of the Arts presents a Jazz Club Evening with Catro at 7 p.m. Sept. 11 at Lincoln Hall, 42 S. Palmer St. Tickets are $15 for adults and $5 for students. Wine and beer will be available. To reserve tickets, visit www.alleghenyriverstone.org or call 724-659-3153.