The Upsetters / SCRATCH THE UPSETTER AGAIN 

“Scratch The Upsetter Again surfaced early in 1970 as a largely instrumental set, but with dreamy reverb a hefty feature and keyboards veering away from standard organ motifs.
As Perry inched ever closer to the dub experimentation he would turn into an art form at his own Black Ark studio later in the decade, Scratch The Upsetter Again shows him moving away from the standard approaches of his competitors in his quest to test the very limits of recorded sound. And reggae was all the richer for it.”