ABSTRACT This paper develops a brief historical account of the architectural development of auditory space and identifies the “soundsphere” as an acoustic project that connects the interrelationships between material, spatial form and sound. The instrumental design of the soundsphere has focused on three types of shells: hard, static, and inflexible; physically manipulable; and immaterial (or electroacoustic). This frames a disciplinary and historical context for Resonant Chamber, a prototype-based design research project that develops a kinetic and interactive interior envelope system aimed at transforming the acoustic environment through dynamic spatial, material, and electroacoustic technologies.