Donato Dozzy and Stefano Di Trapani plumb the kosmische void on 'The Black Sphere', an hour long session using turntables, electronics and brainwave generators for a deep dive into psychedelic, Cluster-inspired drone workouts and tripped-out Techno ballistics. Dozzy and Di Trapani are both experienced improvisors, and Mantenna was conceived as a sort of laboratory for impromptu studio and live electronic performance, using the location and its limitations to inspire and guide their work. 'The Black Sphere' was recorded at Klang in Rome, where Dozzy and Di Trapani not only had to perform with no pre-recorded or practiced elements, but also do so with gear they had never used before - always a chance for failure, always an opportunity for opening up creative wormholes. The side-long title track finds Dozzy and Di Trapani deep in the kosmische vortex, drawing on early Cluster by layering noisy oscillator drones into tripped-out textures, eschewing drums but not ignoring rhythm entirely. Playing off each other, the duo work like jazz players, allowing the sound to expand and then dip to near silence when necessary. Tones undulate like waves, slowly building into rough, ragged noise before dispersing into pulsing abstraction. It's not just a love letter to the '70s Berlin school, but a celebration of analog synthesis, toying with the physical sound of oscillators and cavernous echoes. On the flip, 'Hiranyagarbha' finds the duo programming rhythms using an arsenal of drum machines, opening with a pounding, bass-heavy kickdrum that cuts through a fog of analog screams before taking centre stage, morphing into a distorted, electroid throb that's not a million miles from Mika Vainio or Emptyset. The duo eventually pull back into a corrosive, circuit-bent acid session that peaks with a womping, stepped kick like some classic Plastikman fed through a broken pedal board, or just classic Dozzy, if you like.