Guy Zapoleon is a modern music savant. For the past fifty years he has guided contemporary music radio stations and corporations in identifying the right songs to play at the right time to achieve their target audience goals. Along the way, he discovered a generalized pattern in which contemporary music trends rise from innovation to mass appeal and ultimately to a downturn he calls doldrums. Then, the cycle starts again. He's a music scientist and journalist; he's the ultimate source for radio music directors, artists, and producers everywhere.