Sam Karugu and vocalist Martin Khanja grew up immersed in Nairobi’s hardcore punk and metal scene, but were just as influenced by international acts like Pig Destroyer, Repulsion, and Napalm Death. They each played in reasonably successful metal bands —  Khanja in Lust of a Dying Breed, and Karukugu in Seeds of Datura — but it was coming together as a duo that pushed their sound to the boundary-defying, unrelenting intensity they concoct as Duma. Their Nyege Nyege debut is an arresting listen to say the least, almost bowling you over with its wall of industrial noise, blood-curdling vocals, pummeling electronic rhythms and pitch-black atmospheres. Musically only a few subtle elements hint to Duma’s Kenyan background — the percussion on opener “Angels and Abysses” or the Swahili vocals on spoken vocals of “Pembe 666” for example. But Duma’s music is, in part, a result of their Nairobi upbringing and the frustrations they felt towards its stifling social and religious norms, and it’s in the deluge of noise that they find the greatest freedom.