While the “Riddim Twins” are producers in their own right, this time Sly and Robbie let the Mad Professor twist the knobs. It’s a wonder their sounds never clashed before, but lucky for us, all parties are equally immersed in a retro trip. Instead of turning out digital dub, the Mad Professor tweaks Sly & Robbie’s lovers rock, the numbers sounding as if they emerged from Channel One rather than the Prof’s UK studio, Ariwa. No cyber dub here-instead you get flanged drums, brick-heavy bass and a romantic, swoon-inducing saxophone performed by the ubiquitous and legendary Dean Fraser.