Jazz is a musical art form characterized by blue notes, syncopation, swing, call and response, polyrhythms, and improvisation. It has been called the first original art form to develop in the United States of America.

Jazz has roots in West African cultural and musical expression, and in African American music traditions including blues and ragtime. After originating in African American communities near the beginning of the 20th century, jazz gained international popularity by the 1920s. Since then, jazz has had a profoundly pervasive influence on other musical styles worldwide. Today, various jazz styles continue to evolve.

According to Pulitzer Prize-winning African-American composer and classical and jazz trumpet virtuoso Wynton Marsalis, "Jazz is something Negroes invented, and it said the most profound things -- not only about us and the way we look at things, but about what modern democratic life is really about. It is the nobility of the race put into sound ... jazz has all the elements, from the spare and penetrating to the complex and enveloping. It is the hardest music to play that I know of, and it is the highest rendition of individual emotion in the history of Western music."

The word jazz itself is rooted in American slang, probably of sexual origin, although various alternative derivations have been suggested. More...

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Blues is a vocal and instrumental musical form which evolved from African American spirituals, shouts, work songs and chants and has its earliest stylistic roots in West Africa. Blues has been a major influence on later American and Western popular music, finding expression in ragtime, jazz, big bands, rhythm and blues, rock and roll and country music, as well as conventional pop songs and even modern classical music.

Early forms of the blues evolved in and around the Mississippi Delta in the Southern United States in the late 19th and early 20th centuries, using simple instruments such as acoustic guitar, piano, and harmonica, also known as the "blues harp." Songs had many different forms of structure, although the twelve-, eight-bar, or four-bar structure based on tonic, subdominant and dominant chords became predominant. Melodically, blues music is marked by the use of the lowered third and dominant seventh (so-called blue notes) of the associated major scale. The use of blue notes, as well as the prominence of call-and-response patterns in the music and lyrics, are indicative of the blues' West African pedigree. More...

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