It was a big year for Tan Dun, the Oscar-winning Chinese musician who would go on to compose the soundtrack for the film Crouching Tiger, Hidden Dragon. In the autumn of 1973, Tan, then a teenager, was sent to a rural commune in Hunan province to plant rice. China was at the height of the Cultural Revolution. One day, Tan heard a sound from a loudspeaker in the field. “Do you want to hear some interesting music? This is called ‘symphony’. The Philadelphia Orchestra is in China,” a friend said…