About 60 years ago, composers Pierre Boulez and John Cage fought with music. Boulez, thinking music the very sounds of math, arranged his music with mathematical complexity. John Cage, conversely, heard everything -- a squeak from a dry reed or a cough from someone in the audience -- as music with the improvised notes just as important as the planned ones. These musical greats embodied careening ends of the spectrum. In the end, a great irony arose with much of their music sounding the same.