As the youngest of eight children on a farm near Rosine, Kentucky, Bill Monroe was forced by his older brothers to remove four of the eight strings from his mandolin so he would play more quietly. He lost his mother at 10 and his father at 16, then found stability with his disabled uncle Pendleton Vandiver, the fiddler behind the song Uncle Pen, and absorbed the blues from Black fiddler and guitarist Arnold Shultz. This episode explains how those Anglo-Scots-Irish dance rhythms and blues syncopation collided on a mandolin, producing the aggressive velocity and percussive chop that turned a parlor instrument into a snare drum.

We trace the Monroe Brothers’ 1936 RCA Victor hit, the 1938 split with Charlie, the Blue Grass Boys’ 1939 Grand Ole Opry audition with Mule Skinner Blues, the experimental years that even included an accordion, and the 1945 arrival of Lester Flatt and Earl Scruggs that created the original bluegrass band. The conversation covers the high lonesome sound, the invention of the instrumental break, Elvis Presley’s 1954 rockabilly version of Blue Moon of Kentucky and Monroe’s decision to re-record it faster, the 1953 car crash that broke his back, and how folklorist Ralph Rinzler repackaged him for the 1960s folk revival.

• Why the Nashville sound and rock and roll nearly made an acoustic string band obsolete
• How a young Jerry Garcia followed Monroe’s tour with a tape recorder in 1964
• The more than 150 musicians who apprenticed in the Blue Grass Boys and Monroe’s dismissal that ain’t no part of nothing
• The founding of the Bean Blossom festival in 1967 and performances for four U.S. presidents
• Ralph Rinzler’s five pillars of Monroe’s legacy and his inductions into the Country, Songwriters, and Rock and Roll halls of fame