Blues
Blues is the name given to both a musical form and a music genre that originated in African-American communities of primarily the "Deep South" of the United States around the end of the 19th century from spirituals, work songs, field hollers, shouts and chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues, and rock and roll is characterized by specific chord progressions, of which the twelve-bar blues chord progression is the most common. The blue notes that, for expressive purposes are sung or played flattened or gradually bent (minor 3rd to major 3rd) in relation to the pitch of the major scale, are also an important part of the sound.
Jazz
Jazz is a music that originated at the beginning of the 20th century, arguably earlier, within the African-American communities of the Southern United States. Its roots lie in the adoption by African-Americans of European harmony and form, taking on those European elements and combining them into their existing African-based music. Its African musical basis is evident in its use of blue notes, improvisation, polyrhythm, syncopation and the swung note. From its early development until the present day, jazz has also incorporated elements from popular music especially, in its early days, from American popular music. it differs from European music in that jazz has a "special relationship to time defined as 'swing'", involves a spontaneity and vitality of musical production in which improvisation plays an important role and contains a sonority and manner of phrasing which express the individuality of the performing jazz musician.
Rock and roll
Rock n roll is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s, primarily from a combination of African-American genres such as blues, jump blues, jazz, and gospel music, together with Western swing and country music. Though elements