In 1973, the pop music industry in the Philippines, long dominated by the American Top 40, was jolted by the emergence of a new kind of sound that delivered soulful Filipino lyrics in the medium of Western rock. At about the same time the protest movement found, in the popular forms of Western rock and folk, powerful vehicles for cultural resistance. This experimentation within and outside the industry generated great interest across social classes and opened many possibilities for new kinds of popular music, later to be called Pinoy (slang for Filipino) rock or Pinoy pop music. This article looks into the dynamics of Pinoy pop/rock and protest music during the period of authoritarian rule and after, marking their points of intersection and divergence and analyzing the factors that account for the rich popular music production in the 1970s and the 1980s.