Chet W. A lot of 1930's country/folk singers were VERY conscious of what they were doing and what was--and wasn't--traditional. Buell Kazee used different vocal techniques depending on what he waws singing, as did Vernon Dalhart. Clayton McMichum played cointry fiddle very differently than he played Dixie jazz. And this capability of distinction is still very much with usL John Jackson knows damn well what he's doing, and will do it differently depending upon what he's playing--as will Doc Watson.