@qwerty@Arty24 For a more in depth history on the (sadly) all but forgotten scotch-irish roots of the Blues / Bluegrass music I highly recommend the documentary "End of an Old Song," by documentarian Boscom Lamar Lunsford.
Lunsford was a Southern Populist / Dixiecrat type who preserved more American Folk Music / Appalachian culture than anybody alive or dead.