From his time in the ’60s as a promo man for King Records and a 45 buyer for the Seeburg jukebox company, engineer Tom Moulton knew early on what made a track a hit. It’s said that, in the ’70s, he literally invented the 12″ single, understanding that every last minute of every funk, soul, and disco song was worth dragging out for a prolonged boogie. Collected here are disco hits (Andrea True Connection’s classic “More More More”) and Motown funk jams (Eddie Kendrick’s “Keep on Truckin‘”) but at extended, glorious lengths (the latter is over 11 minutes long). Grace Jones’ extra-slinky cover of Edith Piaf‘s “La Vie En Rose” is simply beautiful.