Placing algorithms in physical robotic devices introduces real-world complexity that enriches the musical result beyond simulation

Greenhalgh (ch17) describes experiments with algorithmic music played back by physical robotic devices — handbells on robotic platforms roaming a building, striking when encountering obstacles. The key insight, drawn from robotics pioneer Rodney Brooks, is that ‘the world is its own best model’: when an algorithm plays through tangible physical objects, the complexity of real-world physics, acoustics, and spatial movement is available ‘for free.’ The result is a spatialized piece that emerges from the interaction between algorithm, machine, and physical environment — something impossible to fully simulate in software alone.

Examples

Five robotic handbells at Newhaven Fort: each follows a simple algorithm (go straight, strike 5-8 times when blocked, swerve), but the building’s corridors, the bells’ resonances, and audience movement co-create the piece.

Assessment

Explain Rodney Brooks’ claim that ‘the world is its own best model’ and describe how it applies to physically embodied algorithmic music. What musical qualities emerge from physical embodiment that software simulation cannot provide?