The blues song thread reminded me of recently having seen it.
Did anyone catch the American Epic documentary on PBS? It's about the record companies going out in the 1920's & recorded many different blues, country, & folk artists. https://twitter.com/colin_dunlap/status/876145037314314240

It included blues artists Mississippi John Hurt, Robert Johnson, Memphis Jug Band, Charley Patton, Son House, Blind Willie Johnson, & more.

Some really great music.

I saw a commercial for it at some point. I have the vague feeling it was due to air in the fall.

You can watch 3 episodes of the documentary here http://www.pbs.org/show/american-epic/