The concept of ontosonography describes the forms of being and becoming through and in sound. Ontosonography offers insight into the multiplicity of interrelated rhythms of becoming and maps the diffusion of intensities of these rhythms on the plane of immanent soundscape. Hence a classification of non/human soundscape forms: biosound and zoesound (sounds made by human and non-human living beings), geosound (sounds made by the planet and planetary processes), and petrosound (sounds produced by exploitation of fossil fuels, including the energy that powers movement, various objects, etc.). This framework is used to map affective soundscapes of (non)life in the twenty-first century dystopian Serbian literature, showing the ways in which various human-made objects, humans, animals, and other beings and phenomena interrelate to form dystopian soundscapes in Miomir Petrović’s Black Light (2018), Luka Tripković’s Crna knjiga (Black Book, 2019), and Tomislav Longinović’s Fetiš nulo (Fetish Nulo, 2020).