Jamaica’s Glen Brown was known as “the Rhythm Master” for good reason: His vivid, jazz-inflected reggae sides were anchored by heavy bass that made Kingston sound system speakers rumble in the early ‘70s. This instrumental collection spotlights his love of skillful musicians: “Dirty Harry” features chugging sax from Skatalites’ Tommy McCook and Joe White’s jaunty melodica enlivens “Merry Up,” while trumpeter Bobby Ellis and trombonist Don Drummond Jr. turn “Determination Skank” into a clarion call for justice. Throughout, Brown distills the creative spirit of reggae’s formative era via his soulfully skanking rhythms.