Nagen can be deciphered as a German word that means 'gnawing', and at times the microtonal drones in this improvised recording have just this character. But the full-on pulsing of audible beatings, pitch-shifted tones rubbing against each other, does also give way to more quiet, often near-silent moments in which the sounds that can actually be heard take on the darkly foreboding character of distant machines – or wild animals? The music of rsn and Nagen opens up a liminal space for the imagination in which the certainties of identification dissolve.