In August 1971, the white wizards of South Africa's psychedelic rock underground shared the stage with the black witchdoctors of the Afro-jazz avant-garde. The event was the Tribal Blues concerts at Wits Great Hall, an unprecedented cross-cultural showcase of independent music hosted by the maverick 3rd Ear Music label. Ourang-Outang (2020) presents rehearsals and jams recorded by 3rd Ear director, producer and engineer David Marks in rural KwaZulu-Natal as this unlikely alliance of musical drui…