This festival continues with James Conlon conducting the Cincinnati Symphony Orchestra and the Cincinnati May Festival Chorus in a program that opens with John Adams's exhilarating choral work "Harmonium." Of special interest is the New York premiere of "The Ordering of Moses," a major work by the black American composer Nathaniel Dett that had its premiere at the Cincinnati May Festival in 1937. When this 50-minute oratorio, which depicts longing for freedom from bondage, was reprised at the May Festival in the 1950s, Leontyne Price and William Warfield were among the soloists.