Blues is the name given to a music genre created by African-American slaves, ex-slaves and the descendants of slaves in the Deep South of the United States at the end of the 19th century . The Blues refers to melancholy, sadness, in their way of living. No single person invented the blues. The blues started in the Mississippi Delta in the time when slavery was still around. It referred to their way of living. The blues form is found in jazz, rhythm and blues and rock and roll and is characterized by the use of specific chord progressions. The twelve-bar blues chord progressions( which we study in this course) is the most common one.
Blues can be divided into several genres ranging from country to urban blues that were more or less popular during different periods of the 20th century. Best known are the Delta( the rural blues of the Mississippi Delta),Jump blues - A combination of swing and blues and, West Coast Blues(West Coast blues is heavily influenced by the swing beat) and Chicago blues(which is Delta blues electrified). World War II marked the transition from acoustic to electric blues. In the 1960s and 1970s blues rock evolved.