Just who, exactly, invented dub might never be agreed upon, but there’s no doubt that Jamaican studio engineer Osbourne Ruddock, a.k.a. King Tubby, was an absolute master of the form. Dub from the Roots—one of his first releases—brings early King Tubby mixes together for a woozy, seminal collection of echoing drums and reverbed studio effects. ”Iyahta” rumbles and swells like a psychedelic thunderstorm, while “African Roots” chugs along like a train about to wobble off the tracks.