Odds are you haven’t heard of Roscoe Holcomb. If you’re a fan of American music, though, his is most certainly a voice worth hearing. Holcomb was the “high lonesome” singer of eastern Kentucky, a man whom performers from John Cohen to Bob Dylan to Eric Clapton revered as a source of spare, original mountain music and the hardship behind it. His voice, which reached almost into falsetto at times, told of work and pain and wondering — stoicism and emotion delivered by a man on a porch with his banjo and the traditions within him.

In the early 1960s, Cohen, a musician and historian, traveled to Kentucky to film a stark, black-and-white movie about Holcomb called “The High Lonesome Sound.” It helped propel the aging Holcomb into a career that took him away from manual labor and, for a time, into a world of performance where people appreciated him for his music.