Jimmy Martin (August 10, 1927 – May 14, 2005) was an American bluegrass musician, known as the "King of Bluegrass". Born James H. Martin in Sneedville, Tennessee, beginning in 1949 Martin was lead vocalist for Bill Monroe's "Bluegrass Boys,". Martin's high voice mixed with Monroe's tenor came to be known as the "high lonesome" sound. His influence radically changed Monroe's music from the fast-paced but smooth style of the "original" 1945 band with Flatt and Scruggs. Martin challenged Monroe to raise the pitch on many of his classics and to write new, "lonesome" songs.

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