RAC’s fans used to find him in the fine print. The Portland producer born André Allen Anjos got his start in the late 2000s remixing indie acts—his alias is short for Remix Artist Collective. All that reverse engineering paid off. By his producer debut, 2013’s “Let Go,” featuring loosely braided vocals from Kele and MNDR, he had honed an ear for nimble arrangements; on 2014’s lush “Cheap Sunglasses,” he played Matthew Koma’s close harmonies off tropical accents. He’s since turned industry connections into a creative strength—whether stars or newcomers, with his unique brand of songwriting, delivering big pop moods with winning restraint.