The descriptor “easy listening” connotes saccharine elevator music, and “goes down easy” suggests diluted medicine. The debut album from The North, a Brooklyn-based piano trio, is called “Slow Down, This Isn’t the Mainland,” and the entire recording is indeed easy like Sunday morning and smooth as a polished seashell. But there’s nothing insipid or cloying; the journey is an aural pleasure. Recorded in Hawaii, “Slow Down” is relaxed, gentle, charming, approachable, and utterly pleasurable. The band covers Chick Corea, Thelonious Monk and Bob Dylan beautifully. The bulk of the project, though, is devoted to lyrical originals, mostly by pianist Romain Collin. His virtuosity, like bassist Shawn Conley and drummer Abe Lagrimas, never calls attention to itself. The North is all about songs — melodies and grooves and especially dynamics. Imagine the Bad Plus blissed out and chilling on a beach. The result is one of the most compulsively listenable trio albums in our collection.