Few musical constructions signal “highbrow” more than a live improvised collaboration between Oscar-winning electronica pioneer Ryuichi Sakamoto and Berlin artist Carsten Nicolai’s pseudonym for sonic work Alva Noto. Now place them doing this for 45 minutes in Philip Johnson’s 1949 Glass House and allow them to use the walls as an instrument just after a rain storm. With gong mallets dragged down the glass’ surface and various mixers and keyboards, it’s an unconventional approach to capturing a moment, but Sakamoto reckons the dramatic landscape and red sunset they watched made for the ideal interface of art and nature. Oddly, it’s less abstract than you might imagine. Its simmers and squeaks develop an atmospheric beauty, and there may even be a wink to Philip Glass in the theme and name. Some love the sound of it breaking, but this pair’s muse prefers to touch it delicately, coaxing answers to questions which only their refined aesthetic can articulate. Being there would have offered extra dimensions, but the attentive listener will find this tonal, spatial, intuitive recording both enigmatic and, gradually, enjoyable.