Dinosaur's increasingly assertive fusion explorations, with Laura Jurd as their benign, Hampshire Miles, have dominated the trumpeter's recent career. Taking advantage of a Kings Place commission to stretch her other muscles, Stepping Back, Jumping In greatly expands on the chamber-jazz palette of her debut Landing Ground (2012) – which also employed the Ligeti Quartet and Dinosaur bandmates Elliot Galvin, Conor Chaplin and Connie Dick – with a 14-piece Anglo-Norwegian group capable of hairsbreadth time-signature turns and odd-angled, spare-lined avant-classical structures. Soosan Lolavar's santoor (an Iranian hammered dulcimer) is one intricate, fleet-fingered asset, sometimes interweaving across continents and centuries with Rob Luft's banjo. Lolovar's ‘I Am the Spring, You Are the Earth’ uses her instrument sparingly, over a bed of brooding, eerie synths and strings. Galvin's gnomic, busy mind offers ‘Ishtar’, owing little to the infamous Warren Beatty/Dustin Hoffman flop comedy of that name with its desert obelisk of a tune, promising impenetrable mysteries. The Ligeti Quartet's use as ominous, woozy texture here is more common than their gypsy jazz during Jurd's ‘Jump Cut Shuffle’. Minds packed with intellectual musical resources created this album, which operates at a high, if sonically restrained, level. And yet, in the last seconds of Jurd's closing tune, ‘Stepping Back’, Galvin gives a bluesy roll to his piano phrases, and is met by Luft's guitar as it reaches towards the wide-open spaces of Ry Cooder's Paris, Texas soundtrack. Jazz and classical sensibilities intersect here in a comprehensibly complex dance.