> the STYLE of the music of the indigenous population

Heh heh. How many styles does that give us in the USA - or even in   Britain and Ireland?

Teenagers are pretty indigenous.

And how much of the indigenous population? Dixieland has been around for a hundred years, beloved by a fair number, though perhaps a minority. Is it "folk music"? Were the blues "folk music" when hardly anyone knew of them? Maybe now they are. Or some of them. Or not.

Does it make complete sense (or any or none?) to lump these things together, plus Lord Randall, Edward, and "Old Chisholm Trail"? I begin to weary ....