The Documentary -   BBC World Service - Nov 2022
Arnold Shultz and bluegrass in Kentucky   
Bill Monroe always acknowledged the black fiddler and guitarist Arnold Shultz as one of his major influences. Rhiannon [Giddens] explores how African-American musicians like Shultz were often mentors to white country stars of the time.
Featuring Joshua Bronnenberg, Dr. Richard S. Brown, Dr. Erika Brady, Dom Flemons, Dr. Andrew Rhinehart and Tray Wellington.   
https://www.bbc.co.uk/programmes/w3ct43cs