Will Long, the ambient wellspring behind Celer’s many gentle streams of consciousness, is forming a fresh estuary with Japanese vocalist Rie Mitsutake. Placid as can be, their single “Seashore” marks the debut of a duo they’re calling Oh, Yoko. The A-side mix sounds like Ai Aso’s gorgeous Land album meeting Julia Holter and Tomoyoshi Date in a cozy, creaky room. The instrumental “version two” on the flip provides an even warmer reiteration, while DJ Sprinkles’ “Ambient Ballroom” remix adds a little techno to the ambiance (and, somewhat inscrutably, a dubbed-out sample of young Gil Scott-Heron’s controversial “The Subject Was Faggots”). A viable fount for contemplation, all around.