As a late-night Glasgow Jazz Festival fixture, Fat-Suit seemed a simple enough proposition at first: a funk big band, built for boozy good times. Their third album, though, finds them outpacing Brooklyn funk-fusion peers Snarky Puppy in the race to studio worth. Recording in a former Glasgow church, the 27 musicians marshalled here suggest the infinite permutations waiting to be explored in a 21st century big band. ‘Colours Burst Behind Closed Eyes’ is a telling overture, dark orchestral sweep meeting rave euphoria. Gypsy jazz violin marks ‘Mr. Hinomaru’, while ‘Cowfords’ is a stately, Celtic vocalese lament. Fat-Suit are best, though, sprawling through epic explorations of dynamic possibility, as in the balm-like rise and fall of strings beneath piano in the nine-minute ‘Twisted Clouds’, or the slow liquid flow of keyboards, sawing strings and roaring brass of ‘The Poor Brooks’ Humble Fish Farm’. The basics of wah-wah guitar and brass blasts haven't been forgotten. Atlas, though, is a sophisticated leap forward.