Pianist/composer/arranger Billy Childs takes a step away from his usual chamber jazz ensembles to tap into his mainstream roots on this satisfying quartet session with Steve Wilson/as-ss, Hans Glawischnig/ and Eric Harland//dr. The team flexes its collective muscles as Wilson’s alto digs deep on “Backwards Bop” and even deeper as Childs and Harland go kinetic on “Dance of Shiva>” Child’s demonstrates why he is in demand as a sideman for a plethora of singers as he is ebullient with Glawishnig on a lovely “Tightrope” and draws up to a riveting climax on a dramatic “ The Windmills of Your Mind.” The pastoral “Stay “ includes velvety vocals by Alicia Olatuja, while Claudia Acuna loans her voice along with Ido Meshyulam/tb and Rogerio Boccato/perc on the galloping “Rebirth” that has Childs opening the piece with some classy piano before drawing away the flood gates. Even in a post bop session, Childs’ arranging and playing skills glisten.