Sound and Habitat Audio Prototyping Environment (SHAPE) is a collection of nature-inspired electroacoustic devices created for sound art in public spaces. It is part of an ongoing audio feedback research project at the Center For New Music and Audio Technologies. By repurposing old electronics and manufactured objects, low-cost materials are used to make interactive sound sculptures and musical instruments. Subtle gestures and actions by participants change the sound in real time.

The project attempts to question the dichotomy between sound art and common environmental sounds through a zero-waste framework. With SHAPE, natural and artificial materials converge; construction and deconstruction hold equal weight; raw materials reclaim another existence; and sounds from unusual sources expand into fully resonating bodies.

Audio transfer is based on two input types for each device, a piezoelectric contact mic and an electret air mic. In combination, these elements sense vibration in material and sound waves in air. Both analog and digital electronic environments are programmable—allowing for quick on-site prototyping.

Aside from the PCB fabrication, smartphone, and case construction, all of the e-components for these devices can be found easily in old discarded speaker systems and reused. Proprietary devices such as the iRig are currently being used, but these will be reverse engineered for future open-access integration. Open-source software such as Pure Data and MobMuPlat make any Android or iOS device compatible with this system—thus facilitating second-hand use of virtually all smartphone models. Considering the portability and cost-effectiveness of this project, SHAPE is particularly adept at facilitating outdoor applications such as sound installations or musical performances.

> Jon Yu, Music Composition
> Mia Mirkovic, Electrical Engineering and Computer Science
> Satcher Hsieh, Physics
> Jason Cress, Music Composition
> Alois Cerbu, Mathematics

> BLOOM (2019), a flower-like piezo self-drive oscillator
> TONE (2019), a tree-like waveguide with eletret mic array and spherical glass loudspeaker
> BULB (2019), an onion-shaped analog resonating semi-sphere with rotating aperture
> FLOW (2019), an air-duct resonator with digital processing
> ARC (2018), Acoustic Resonance Circuit
> LARSEN (2017), an open cylinder waveguide system with digital processing

> eScholarship
> ProQuest

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