This practice-based research aims to investigate hybrid processes of identifying non-linear modes of time/ event(s), drawing upon models from different disciplines to explore contemporary understandings of hybrid long durational audio-visual works within site-specific contexts. The research focuses on non-linear relationships between space (both physical and virtual) and temporal events within audio-visual works of a (perceived) long or open duration. A series of audio-visual installations, performances and webcasts/ transmissions will be created to investigate non-linear relationships between sound and image, rather than the linear relationships implied by long duration. These works explore the time/ duration in onscreen/ off-screen, virtual and sonic spatial contexts. The research questions aesthetic and philosophical strategies employed in contemporary audio-visual practices including: repetition/ difference, simplicity into complexity, accumulation of event, interruption, instability and indeterminacy.