countrypolitan:

Sophisticated approach to the vocal presentation and instrumental arrangement of country music; a fusion of “country” and “cosmopolitan.”

Nashville sound:

Country music style involving polished arrangements and a sophisticated approach to vocal presentation. The recordings of Patsy Cline were among the most important manifestations of the Nashville sound.

psychedelic rock:

Music played by San Francisco bands that encompassed a variety of styles and musical influences, including folk rock, blues, “hard rock,” Latin music, and Indian classical music.

soul music:

African American musical style rooted in R&B and gospel that became popular during the 1960s.

urban folk:

Style of folk music that grew in popularity in the burgeoning New York folk scene during the 1960s. It included artists such as Bob Dylan.