The title refers to Plato's heavenly realm of ideal forms, which provides the loose concept behind Chat Noir's seventh album as experienced by an astral traveller, while also suggesting their own rock, jazz and techno ideals. They are electronica these days, but with subtle dynamics and prog refusal of repetition recalling their jazz beginnings. Michele Cavallari's keyboards sometimes hint at the crystalline beauty of Derrick May's techno masterwork ‘Strings of Life’, while newly permanent guitarist Daniel Calvi offers soundtrack twangs and psychedelic ambience. Guest Nils Petter Molvær, no stranger to the electronic/jazz interface, is the crucial rogue element, reacting to a sometimes thunderous rave context with intuitive emotion. His trumpet's muted melancholy floats in like smoke on ‘Humanity’, hanging suspended in the ether to give the track soul. His more fierily meteor-like trail on ‘Glimpse’ sends it screaming into orbit, where he's finally found floating through cosmic dust on ‘Quasar (Reprise)’, which expands around a held synth note's hard core to hit a propulsive groove. If the drama sometimes tips towards multiple forms of near-MOR, from Tangerine Dream to Faithless, textures remain imaginative, and at least these event horizon clubbers come in peace.