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Rock and roll is a form of rock music developed in the 1950s and 1960s. Rock music combines many kinds of music from the United States, such as country music, folk music, gospel music, work, blues and jazz.. Rock and roll developed in the early 1950s from a kind of music called rhythm and blues performed by black singers and musicians.At first, this music was popular. klezmer music, genre of music derived from and built upon eastern European music in the Jewish tradition. The common usage of the term developed about 1980; historically, a klezmer (plural: klezmorim or klezmers) was a male professional instrumental musician, usually Jewish, who played in a band hired for special occasions in eastern European communities. In the 21st.