One of Sun Ra’s great contributions to improvised music was the notion of using the synthesiser not as a melodic instrument, but as a generator of pure, abstract sound. It’s an idea Alex Bonney pursues to mind-bending effect on these three otherworldly jams in the company of two dependable UK heavyweights, drummer Mark Sanders and saxophonist Paul Dunmall.

On the opening 'Resonance Refractions', the synth gloops up a thick murk, seeded with a grainy drizzle of drums and cymbals, out of which Dunmall’s sax emerges with a forlorn call. When Bonney switches to trumpet – letting off short squiggles that bob and weave together with the sax – an ominous background throb keeps the weird energy high.

The shorter ‘Arid/In Phase’ sets off tactile synth squits and pops, coaxing harmonic cymbal scrapes and low tenor burble. While these two excursions deal in a kind of sustained alien tension, the 19-minute ‘Generating Worlds’ offers an exhilarating release as Sanders dives into a clattering pulse-time drum barrage, with Dunmall letting rip on tenor and Bonney sliding from a sepulchral rumble and roar to a deliciously chewy torrent of squidge. It’s a highly satisfying slice of space-aged free-jazz.