Pottery practices stretch back to early human civilizations. While the technology we use to fabricate with clay has evolved, the process through which it vitrifies remains the same. The crystalline structure of ceramic provides both strength and beauty. As an ode to this ubiquitous material that transcends human experience, we augment two 3D-printed clay vessels with electronic components. We process the physical sound of these vessels being struck by motors through systems of oscillators, which, like groups of fireflies, exhibit coupling behavior. This is The Vitrified Sounds Instrument.