one of my first encounters with this hill country music
was Instrumental music of the southern appalachians..
it has been re-issued on c.d.

it has Hobart Smith , among others, on it.

I think there is info on the Smithsonian folkways site
'about this and other traditional music..

als the fellow who was consultant on the Cold Mountain
music was band member of Cordelia's Dad, the name escapes me now.
I think we have had threadsa bout him...Tim Erickson perhaps?
he did the musical direction on the scenes with shape note music in them.