The three feral epics contained on The Mathematics Of War – Coleman and Byrd's follow-up to last year's superb Who Doesn't Fade? – may not solve the equation of conflict currently percolating through the United States (and the world at large), but addresses it head on with a counter-terror barrage of crossed circuitry and percussive shots to the skull. This is unhinged anti-music, toxic and full of untrammelled rage, from two musicians exasperated at their country's continuing paroxysms of illiberal intolerance. The duo's caustic flagellations come over like a weaponised take on The Necks or the suffocating exhaust of a Dead C-scented bio-threat, banishing howls of sputtering derision as they watch their liberty land become a withered myth. Albert Ayler had us believe that ‘Music Is The Healing Force Of The Universe’. But here's documentary proof that some wounds are simply too deep to salve.