Blues refers to a type of slow, sad music from the Southern US, from the city of New Orleans. The Blues is derived from a blend of field chantey and spiritual-- a form of hymn singing prevalent in African-American Christian churches. The tradition of the vocal balled usually accompanied by a guitar, also contributed to the blues form. The music of the blues has a peculiar, poignant sadness. The lyrics of the blues pieces are sardonic filled with wry, self-deprecating humor.