“CHOO CHOO CH’ BOOGIE”: THE POSTWAR ERA, 1946–1954 Key Terms and Definitions 45 rpm: Introduced by the RCA Victor Corporation in 1949, the seven-inch 45 rpm single (called the “45”) became the favored medium for distributing hit singles. The disc spun at 45 revolutions per minute (rpm). bel canto: A technique used by opera singers that emphasizes breath control, a fluid and relaxed voice, and the use of subtle variations in pitch and rhythmic phrasing for dramatic effect. boogie woogie: A blues piano tradition that sprang up during the early twentieth century in the “southwest territory” states of Texas, Arkansas, Missouri, and Oklahoma. In boogiewoogie performances, the pianist typically plays a repeated pattern with his left hand, down in the low range of the piano, while improvising polyrhythmic patterns with his right hand. crooning: A style of singing made possible by the invention of the microphone. It involves an intimate approach to vocal timbre. “CHOO CHOO CH’ BOOGIE”: THE POSTWAR ERA, 1946–1954 bluegrass: A style rooted in the venerable southern string band tradition. It combines the banjo, fiddle, mandolin, dobro, guitar, and acoustic bass with a vocal style often dubbed the “high, lonesome sound.” The pioneer of bluegrass music was Bill Monroe. blues crooning: A cool style of rhythm and blues; a blend of blues and pop singing. Chicago electric blues: A style of postwar urban blues that was derived directly from the Mississippi Delta tradition of Charley Patton and Robert Johnson. It featured the amplified sound of instruments such as the electric guitar and harmonica and reflected the musical tastes of black Chicagoans, many of them recent immigrants from the Deep South. The music tended toward rougher, grittier styles, closely linked to African American folk traditions but also reflective of an urban orientation. crooning: A style of singing made possible by the invention of the microphone. It involves an intimate approach to vocal timbre. honky-tonk: A style of postwar country and western music sometimes called “hard country” or “beer-drinking music.” Born in the oil boomtowns of Texas and Oklahoma, it conveyed the sound and ethos of the roadside bar or juke joint. “CHOO CHOO CH’ BOOGIE”: THE POSTWAR ERA, 1946–1954 jump blues: The first commercially successful category of rhythm & blues, flourished during and just after World War II. Ensembles were smaller than the big bands of the swing era and specialized in hard-swinging, boogie-woogie– based party music, spiced with humorous lyrics and wild stage performances. montuno: Spanish term for a formal section within a performance of Afro-Cuban dance music (such as a rumba, mambo, or salsa). The montuno, generally the second half of a given piece, alternates a fixed vocal refrain (the coro) with a solo vocal improvisation (the pregón), and may also include instrumental solos.