Folk musician Mike Seeger died Friday from multiple myeloma (a cancer of the plasma cells) at his home in Lexington, Va., the Associated Press reports. He was 75. Seeger was the younger half brother of Pete Seeger. The multi-instrumentalist was one of the founders of The New Lost City Ramblers, and throughout his career he recorded more than 40 albums solo or with others. He also documented and taught traditional forms of American music.