Un-easy listening from »anti-singer« and improviser Sofia Jernberg, a celebration of the voice in its rawest, most malleable form. Jernberg was born in Ethiopia and grew up in Vietnam and Sweden, so one can only imagine these diverse languages opened up a wealth of phonetic possibilities before she entered academia to study jazz and composition. If you dive into her catalogue you’ll clock her startling range – working as a jazz soprano and as an improviser, collaborating with everyone from Stefan Schneider to Mats Gustafsson, as well as appearances on the stage and screen, most notably in Matthew Barney, Erna Ómarsdóttir, and Valdimar Jóhannsson’s »Union of the North«.

On »Voice«, Jernberg provides a ground-level entry point to her work, meticulously running through a litany of unconventional techniques (non-verbal vocalisation, split tones, toneless singing, and distortion) without any effects, just pure batshit sonics designed to show off the voice’s scope as an experimental instrument. On »Mouth Synthesizer« she purses her lips to make ratcheting pops like some analog oscillator, hoarsely mimicking the sort of blustery, Merzbow-coded distortions you might get if you patched a RAT pedal into a broken guitar amp. It isn’t an act of caricature, it’s Jernberg’s way of demonstrating that expensive modular rigs aren’t an essential tool for experimental music, before throwing a side-eye to the field recording industrial complex on »Birds«, transforming her vocal chords into a nightmare aviary. But it’s Jernberg’s startling »multiphonic« experiments that hit hardest. The album opens on »Multiphonic I«, and it’s difficult to tell that you’re listening to a human voice at first – you could just as well be on Colin Stetson’s overblown sax airstreams. Jernberg creates a captivating spiral of crooked, phased tones and hoarse, guttural croaks that she develops over three movements. On »Multiphonic II«, her voice is turned into a storm of pained shrieks, and on the third and final segment, it almost resembles Arve Henriksen or Jon Hassell’s muted brass curlicues. Each track pulls a different musical muscle, whether it’s »One Pitch« with its unsettling yodel-like quivering drones or »Gurgle«, sounding like a close mic-ed recording of a small pot gently simmering.