Ambient dub involves the genre melding of dub styles made famous by King Tubby and other Jamaican sound artists with DJ inspired ambient electronica, complete with all the inherent drop-outs, echo, equalization and psychedelic electronic effects. It often features layering techniques and incorporates elements of world music deep bass lines and harmonic sounds which evolve. As writer and performer David Toop explains in an early Beyond Records newsletter, "Dub music is like a long echo delay, looping through time...turning the rational order of musical sequences into an ocean of sensation."