From 'Crouching Tiger' To 'Secret Songs': Composer Tan Dun's Next Move

This week, harpist Elizabeth Hainen and the Philadelphia Orchestra will perform the U.S. premiere of Tan Dun's Nu-Shu: The Secret Songs of Women. NPR's Rachel Martin speaks with Tan and Hainen about the work, which was inspired by an ancient secret language spoken by women in Tan's home province.