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| | BIGpedia - Jazz - Encyclopedia and Dictionary Online |
 | | Early jazz influences found their first mainstream expression in the marching band and dance band music of the day, which was the standard form of popular concert music at the turn of century. |  | | When jazz musicians improvise, they usually use a chord progression — the series of chords that define the harmonic structure of a piece of music. |  | | This marked a major shift of jazz as pop music for dancing to a high-art, less-accessible, cerebral "musician's music." Bop valued complex improvisations based on chord progressions rather than melody. |
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http://www.bigpedia.com/encyclopedia/Jazz
(5091 words)
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| | The World of Jazz - Larousse Encyclopedia of Music |
 | | All jazz is syncopated music, but not all syncopated music is jazz. |  | | Jazz is based on the principles of improvisation on a given harmonic base. |  | | From here on jazz was to be a musician's music, its harmonic conventions so convoluted that it became increasingly difficult for the untrained ear to distinguish the justified neologism from the unjustified solecism. |
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http://www.festivalfans.com/aboutjazz/worldofjazz.htm
(5525 words)
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