Urban Roarargues for the existence of 'autonomous affectivities' that roar beneath the din of the urban, seeking the attention of us humans so captured by the environments of our own making. In hearing the urban roar, it is the mythic intention of this book to discover ways in which we can work with the intensities of more-than-human forces to vitalize our cities. The book explores methods by which artists, particularly those sound artists involved in fieldwork practices, might encounter and translate autonomous affectivities between different environments. Of particular interest is Jung's concept of synchronicity and its relationship to artistic creation - as experience, flow and catalyst - in manifesting autonomous affectivities into diverse and affective environments. The book makes use of both theoretical and practical approaches: from a study of scholarship through which it is argued that an autonomous affectivity is equivalent to anarchetype(via Jung) and anessence(via Deleuze's reading of Spinoza), to theoretical considerations of the situated body in everyday contexts, to practical study of an artistic research experiment designed to reveal and index autonomous affectivities encountered during fieldwork practices, for the purpose of influencing urban design interventions. In this fresh analysis, Lacey reveals the possibilities in urban environments.