Chill-out and rap might not seem like obvious bedfellows, but that hasn’t stopped Alex Lustig from injecting chart-topping hip-hop with his own ambient flavor. Under his own name, the Belgian producer makes lilting, low-key instrumentals designed to counteract his anxiety, and his beats for rappers are equally sedate. On Gunna’s “DIRTY DIANA,” he complements the rapper’s sing-song voice with a silky guitar melody, while his cuts on Drake’s Honestly, Nevermind are a blend of lo-fi house and gauzy synth-pop.