Whoa!
The Walker Art Center in Minneapolis has launched a remarkable archive of creative black music dating back some 40 years, including audio (and in some cases video) of the Art Ensemble of Chicago, Ornette Coleman, Cecil Taylor, Henry Threadgill, Anthony Braxton, Julius Eastman, Betty Carter, Wadada Leo Smith, and Amiri Baraka.
https://walkerart.org/collections/publications/jazz/creative-black-music-at-the-walker-selections-from-the-archives