Max Corbacho returns with a long-form disc of his signature lighter-than-air drifts in Ars Lucis.  Corbacho’s constructs float in higher registers, airy choral sounds occasionally lifted by a bass rumble updraft. This is, as the cover art suggests, a soundtrack for watching light filter through stained glass in a sacred space. Notes spiral angelically upwards in a slow dance, gracefully filling the air. There’s a delicate feel to the work here, as though a single touch would shatter it into glistening fragments. Ars Lucis is a disc that truly comes into its own when played as a low-volume loop, and it’s an ideal meditation CD. Although split into seven tracks, it plays as a seamless flow. The music here clearly resonates with Steve Roach’s influence on Corbacho’s style—I hear it in the slow-motion layering, the depth and soft elegance of sound that calls to mind the Quiet Music series. (I also hear hushed memories of Giles Reaves’ Sacred Space.) But influences aside, this is true-to-form Corbacho, with all the gentle beauty he’s exhibited in his past releases. It’s a welcome return from a talented ambient artist.