Jazz is a music genre 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 combining by African-Americans of certain European harmony and form elements, with their existing African-based music. Its African musical basis is evident in its use of blue notes, improvisation, polyrhythms, syncopation and the swung note.[1] 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.[2]