abstract:KPPC-FM was a Pasadena, California FM radio station best known during the period 1967–1971, when it was one of the leading "underground" radio stations in the United States, presenting a freeform mixture of experimental and historical music with countercultural ideas. In contrast to the dominant Top 40 format, each KPPC disc jockey selected his own music, which would veer between genres, including rock and roll, folk music, blues and comedy.