新托福阅读背景知识：爵士乐的根源
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The roots of jazz
The folk songs and plantation dance music of black Americans contributed much to early jazz. These forms of music occurred throughout the Southern United States during the late 1800's.
Ragtime, a musical style that influenced early jazz, emerged from the St. Louis, Mo., area in the late 1890's. It quickly became the most popular music style in the United States. Ragtime was an energetic and syncopated variety of music, primarily for the piano, that emphasized formal composition.
The blues is a form of music that has always been an important part of jazz. The blues was especially widespread in the American South. Its mournful scale and simple repeated harmonies helped shape the character of jazz. Jazz instrumentalists have long exploited the blues as a vehicle for improvisation.
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