KEXP Documentaries: Blues for Hard Times – “Crossroad Blues” by Robert Johnson Robert Johnson is known as the “Grandfather of Rock n Roll”.� Whether or not this Delta bluesman from the 1930’s invented the chords that rock and roll was built on is debatable. But there is no doubt that the 29 songs he recorded in 1936 and 1937 influenced the writing of the most famous names in rock including: Bob Dy
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