It would be interesting to uncover where the division that produced the label "volks" music or "folk" music started. And in contrast to what?

I would think it is kin to the division between lay and church forms, but I would love to be able to see the developmentof the division clearly. Any good references known?

A second division between "folk" and "popular" (odd distinction!) must date from no earlier than AM radio I would think...maybe Victorian parlor music...

A