enote an idiom, not just an instrumentation. The strategies of arranging and soloing that were established during the 1930s link all large jazz ensembles more than the different rhythmic and harmonic concepts distinguishing those of one era ("Big Band"). Boogie-woogie seems quite accessible to the listener. It is a piano style that was occasionally orchestrated successfully. This style came into existence when it became necessary to hire a piano player to substitute for an orchestra. Most boogie-woogie is played on the blues chord progression. During the 1930s, the strict blues form was being used more in jazz recordings as the tempos were speeding up. In the years before 1940, the primitive blues form of boogie-woogie became a popular fad ("Boogie-Woogie").Cool jazz followed bop but was entirely different. In this era, that began in 1947, many instruments were used in jazz for the first time. Longer forms were also made possible because of the introduction of long-playing records ("Cool").Scat is the art of creating an instrumental-style improvisation vocally. A vocabulary of vowels and consonants was used. Scat related less to identifiable words and more to the tone and articulations of jazz ("Scat").Acid jazz used elements of many different styles. It combined jazz, funk, and hip-hop. Acid jazz is percussion heavy, live music. It is closer to jazz and African Cuban than any other dance style ("Jazz Styles").Ballads are lyrical and melodic pieces that can be sung or simply any selections taken at slow tempos. Ballads came to age with the rise of the great American popular song ("Jazz Styles").Many different time periods either caused or resulted in styles of jazz. Big band was popular in the 1930s and 1940s. Bop, Be-bop, or Re-bop was popular in the 1940s. It was usually sung fast with intricate melodies borrowed from Latin American and African Cuban styles. Blues was early jazz. It was moderately slow and sad. Bo...