2. A style of music originating in the mid-nineteenth century from southern African-American secular songs usually featuring a syncopated 4/4 rhythm, flatted thirds and sevenths, a 12-bar structure, and lyrics in a three-line stanza in which the second line repeats the first.
“The blues is an expression of anger against shame and humiliation” (B.B. King).
b. This music only needs a single voice accompanied by one or more instruments.
I hate to see that evening sun go down.
'Cause my baby, he done left this town.