Since then, Haden has made a career in jazz, but his 2008 album, a bluegrass collection called Rambling Boy, returns to his country roots.

NPR: Charlie Haden: A Bassist With A Country Pedigree

The two dug into Charlie Poole's old recordings as well as Kinney Rorrer's biography, Rambling Blues to celebrate the life and times of the country-music pioneer, who died in 1931.

NPR: Loudon Wainwright's 'Charlie Poole Project'