Bllues Style and Culture Origin

There are few characteristics common to all blues, because the genre takes its shape from the idiosyncrasies of individual performances. However, there are some characteristics that were present long before the creation of the modern blues. An early form of blues-like music were call-and-response shouts, which were a "functional expression... style without accompaniment or harmony and unbounded by the formality of any particular musical structure." A form of this pre-blues was heard in slave field shouts and hollers, expanded into "simple solo songs laden with emotional content". The blues, as it is now known, can be seen as a musical style based on both European harmonic structure and the African call-and-response tradition, transformed into an interplay of voice and guitar.

Many blues elements, such as the call-and-response format and the use of blue notes, can be traced back to the music of Africa. The Diddley bow, a homemade one-stringed instrument found in parts of the American South in the early twentieth century, and the banjo, are African-derived instruments that may have helped in the transfer of African performance techniques into the early blues instrumental vocabulary.^{[ citation needed ]} Blues music later adopted elements from the "Ethiopian airs", minstrel shows and Negro spirituals, including instrumental and harmonic accompaniment. The style also was closely related to ragtime, which developed at about the same time, though the blues better preserved "the original melodic patterns of African music". The blues form itself bears no resemblance to the melodic styles of the West African griots, and the influences are faint and tenuous. And no specific African musical form can be identified as the single direct ancestor of the blues.

Blues songs from this period, such as Lead Belly's or Henry Thomas's recordings, show many different structures. The twelve-, eight-, or sixteen-bar structure based on tonic (I), subdominant (IV) and dominant chords (V) became the most common forms. What is now recognizable as the standard 12-bar blues form is documented from oral history and sheet music appearing in African American communities throughout the region along the lower Mississippi River, in Memphis, Tennessee's Beale Street, and by white bands in New Orleans.