“I am Charles Mingus, half black man, half yellow man. . . I play jazz, I am a Negro,” declares the volatile, uncompromising genius at the start of McGlynn’s riveting look at the tortured musical life of the great composer and bass player. Over the course of nine years of digging, McGlynn unearthed a wealth of rare performance clips, radio broadcasts, photographs, and interviews to fashion an indelible portrait of an artist of unparalleled talent and complex, paradoxical temperament.