Penumbra_prototype
Xu Chia Chun+ Luca Bonaccorsi
Penumbra_prototype is an audio-visual performance developed by Chia-Chun Xu and Luca Bonaccorsi, conceived to create a multi-media environment arising from the interplay between sound and image, investigating the possibilities of dialogue between the analog and digital realms.
The sound emerges from a no-input feedback system constructed by Xu in late 2024 — a configuration that resists stability and remains in a state of ongoing transformation. Each iteration responds to the acoustic and spatial contingencies of its environment, unfolding as a distinct yet related manifestation. The work situates itself within a threshold where sound alternates between articulation and decay, coherence and entropy. Through the self-referential logic of feedback, it examines conditions of partial presence and perceptual ambiguity, where form becomes mutable and boundaries dissolve.
The multitude of frequencies created are fed into Bonaccorsi’s computer, where their spectral components are analyzed, manipulated, and reorganized through sound analysis techniques, resulting in the generation of a real-time visualization. The image acts as a constant recompiling counterpart to the sound material, where pressure, motion and mutation trigger transformations in shape, color and coordinates of an abstract landscape.
Sound and image co-exist as indivisible elements, striving to create a contained, multi-sensory experience, in which the performance devices operate as terminals mediating between the human and the digital.
Xu Chia Chun (Taipei) (b. 1997, Taiwan; based in Sintra, Portugal) is an experimental musician, organizer, and independent label manager. Centering his practice on the No-input Mixing Board, he explores the boundaries of feedback, noise, and improvisation while fostering communities around experimental sound. He founded Karma Detonation Tapes, a label connecting Taiwanese and international underground artists, and initiated Outer Pulsation, a guerrilla noise performance series reclaiming public spaces. In recent years, his work has expanded into installation and multimedia collaboration, including Booom Room (X-site 2021), the Taiwan Fine Arts Biennial (2022), and sound design for performance-based projects like You Have No Time (2023) and Borboleta do Céu e da Terra (2025).
Luca Bonaccorsi (Metropolitan City of Venice) is a sound and video artist from Italy currently based in Taipei, Taiwan. His artistic practice explores human relationships amid technology and new media and their effects on daily life.
Originally coming from an experimental filmmaking background, his work gradually shifted toward video art, audio-reactive visuals, and installation. Bonaccorsi’s art has been exhibited at venues such as the National Taiwan Museum of Fine Arts in Taichung and the Taiwan Contemporary Culture Lab (C-LAB) in Taipei, among others.
In recent years, he has focused on live audio-visual performance, integrating algorithmic and procedural sound processes with real-time generated visuals. His performances include the 2024 Sonic Shaman Music Festival in Taipei, and a collaboration with Taiwanese musician Lim Giong at the 2025 JAM JAM ASIA at Taipei Music Center.
