Robert Gerard Pietrusko has long approached sound as if it were a form of urban planning: something to be mapped, shaped, and gently coerced into revealing its hidden structures. With Environmental Studies, though, he shifts from sculptor to ecologist. He doesn’t impose form - he invites it, then steps back to watch the environment negotiate with itself.

The premise is almost disarmingly basic: a microphone pointed at a loudspeaker, a taut loop of attention between two devices that would normally behave themselves. But once this system is released into the Carpenter Center - the only North American building designed by Le Corbusier - the whole place starts behaving like a resonant organism. Concrete surfaces, circulation paths, gallery voids, the wandering public: everyone and everything becomes part of the instrument, whether they intended to or not.

What’s striking is the absence of composed material. Nothing is written down, there is no “original” version hiding somewhere in Pietrusko’s notebook. All sound emerges from interaction: the system’s shifting parameters, the quirks of the architecture, and the fidgety presence of those who happen to pass through. It’s a bit like those conversations where you forget who started speaking - except the egos have been graciously removed from the equation.

Across its three long sections, the album reveals an environment thinking out loud. Tones flutter like nervous eyelashes, drones bloom and collapse under the gallery’s geometry, and faint harmonic tensions drift around as if testing the limits of the room. Now and then a sudden shimmer or wobble appears - a reminder that Le Corbusier believed buildings should provoke, not simply behave.

The irony is that this recording captures only one evening of a month-long installation in 2015. Yet the piece sidesteps nostalgia entirely: it belongs too deeply to the acoustics of its moment to sound dated. What you hear is not a fixed artwork but a trace of an encounter - an imprint of how space, system, and people briefly arranged themselves.

Pietrusko, with his dual background in design and composition, continues to build bridges between disciplines that most artists keep in separate drawers. No wonder his work appears in major museums and biennales: he doesn’t so much compose music as create listening conditions, situations in which sound is coaxed into revealing its spatial DNA.

Environmental Studies is a map without a key, an echo studying its own reflection, a quiet reminder of our scale. Sound doesn’t belong to us; it passes through, measures us, and moves on. If you let it, this album teaches you to follow it - not like a melody, but like a weather pattern.