The Ying Quartet will perform this Sunday at Christ Episcopal Church. (Photo by Todd Maturazzo) Music Festival Opens 25th AnniversarySeason with Ying Quartet COOPERSTOWN—The Cooperstown Summer Music Festival will open its 25th anniversary season with a performance by the highly acclaimed Ying Quartet this Sunday, May 7 at 4 p.m. at Christ Episcopal Church. The quartet will present a program titled “American Made,” opening with Barber’s Quartet in B minor—from which his famous “Adagio” movement is drawn—and continuing with works…