Tom Moulton was the genius who invented the remix in 1974, but it wasn’t only a head start that made him one of the masters of dance music. The ‘70s-era extended mixes on these two discs are impossibly sumptuous, infinitely replayable and mostly unfamiliar to anybody but serious disco freaks. Moulton restructures and tweaks deep (and shallow) soul songs to build, crest and pour weightlessly over a sweaty crowd or a solitary listener. Unsurprisingly, they’re almost all about love and its physical manifestations, and time’s been kind to them: porn queen Andrea True gasping for more-more-more and Isaac Hayes coaxing two young ladies into a moonlit threesome were once campy cartoons of sexiness, but the earnest melodrama of their delivery and Moulton’s throbbing rhythms now sound genuinely seductive.

DOWNLOAD: South Shore Commission, “Free Man”; Eddie Kendricks, “Keep On Truckin’”; Detroit Emeralds, “Feel the Need in Me”