Questlove-directed documentary 'Summer of Soul' tells the story of the 1969 music festival in Harlem that featured Stevie Wonder, BB King, Mavis Staples, Nina Simone, Gladys Knight and more. It was attended by hundreds of thousands of people and happened the same summer as Woodstock, but was largely forgotten about until now.

KEXP’s Larry Mizell, Jr. catches up with one of the film’s producers, Joseph Patel, to learn more about the festival and how its story was told.

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