Listen, and you will hear it: the beat of New York City. It's everywhere you go From the subways to the streets, from parks to bars, from churches to concert halls. Music in all its glorious forms, sometimes sublime and sometimes spectacular, is a vital part of city life and has been for centuries. Whether a pair of dueling drummers on 42nd Street or break-dancers in Washington Square Park, a mural in the Village or a memorial to John Lennon--New...