J.R. stands for Jamie Roots and it’s the project of Uruguayan Juan Chao who spent three months living in Africa jamming with the locals. The product of those jamming sessions is this great free EP taking in influences from Africa, the West and Latin America.
Some madness on this and really interesting material, well worth investigating. The Percussion is mad dope!
Here’s a self-made documentary too of that journey and one of his jamming sessions: