Warwick, N.Y. On Sunday, Aug. 7, at 5 p.m., Pacem in Terris will offer the fourth concert in a remarkable season of sell-outs. It will include the classical guitarist Scott Jackson Wiley and violinist Robin Zeh. After nine years in Spain, Wiley won the exceptional honor of first prize at the Barcelona Conservatory, and is now conductor of the South Shore Symphony and the Long Island Opera. There is no better interpreter of the great Latin American composer Villa Lobos. In this concert, Wiley will celebrate Manuel de Falla: it is perhaps surprising that this most powerful of modern Spanish composers, whose opera "La Vida Breve" penetrates the very soul, virtually ignored the guitar as a direct vehicle for his musical inspiration for most of his life. But after the death of Charles Debussy, de Falla was asked to compose a homage to this musician whom he admired above all others. In a single stroke, he composed a masterwork for the guitar, this most Spanish of all instruments. This homage by Wiley will contribute much to the concert. Zeh was an almost sensational surprise when a few seasons ago her violin sang the Passacaglia. She performed during the 2003-2004 season at the Adelaide Festival in Australia, the Mozart Festival in Washington, and the Central Vermont Chamber Music Festival. She also appears regularly with the American Ballet Theatre and Orchestra of St. Luke's. She has chosen works from Georg Phillip Telemann, Gabriel Faure, Fritz Kreisler, and Astor Piazzola's "Nightclub 1960." Pacem in Terris is a not-for-profit organization under the education laws of the State of New York, located at 96 Covered Bridge Road, Warwick, N.Y. No reservations are taken. Tickets go on sale at 4 p.m., with a suggested donation of $8.