Seattle producer Jon McMillion is best known for his distinctive, soulful experimental-house releases on labels like Ostgut Ton, Orac, Nuearth Kitchen, and Zoombézoom. But besides reigning as one of this city’s foremost electronic musicians the last eight years, McMillion maintains an obsession for rare European disco records—an extremely esoteric stratum of the vinyl-collecting world.

Under the handle Crybaby’s Room, McMillion’s created a heady mix of these super-obscure platters called Disco Harmonics. Trust me when I say you’ve likely not heard any of these tracks before. To procure these records, McMillion spent a lot of “late nights digging on eBay, Discogs, and [engaging in] early-morning Skype calls with international sellers.”

McMillion spent three months working on what he dubs his “love letter to disco and the ’70s. This new mix represents all that I love about underground ’70s dance music, library jams, and moody ballads. I love the personality of the tunes, the originality, and most of all how they ooze freedom and creativity. Those who know me know that disco is my favorite genre, but with this mix I begin my path into even deeper territory.”

How does an American music fan find out about this secret network of European music that is zealously guarded from mainstream society? How did McMillion gain entry into this netherworld?

“It's a very secretive world," he said. "Collectors hustle and spend months, years on forums and what not to establish relationships with other collectors. There are several low-key websites that occasionally provide detailed info (IDs) on new digs and older mysteries. Early on, I occasionally encountered disinformation on some forums regarding some IDs. But to be honest, there's no specific way one gets deep into this world. A person has to be willing to do tons of research, and make many mistakes in the process (i.e., buying duds). I was lucky to befriend a few of the genre’s best collectors. I'm constantly doing research, exploring labels on Discogs. It’s a lot of detective work.”

I would love to provide a tracklist for Disco Harmonics, but if I did, McMillion would be excommunicated from the underground-disco cabal and probably have his PayPal account hacked. So just listen and enjoy these idiosyncratically hedonistic and beautiful Shazam-stumping cuts.