This supplement applies the electromagnetic lattice framework developed in "The Computable Universe" (2026) to sonoluminescence — the emission of light from violently collapsing bubbles in liquid. We argue that the extreme compression during single-bubble sonoluminescence temporarily densifies the local electromagnetic propagation lattice, forcing matter normally between the threads onto computable paths and producing a brief window of anomalous electromagnetic accessibility. The key insight is that the relevant variable is not absolute energy density (which at sonoluminescence scales is 100 orders of magnitude below the Planck scale) but the rate of compression — the spacetime curvature gradient. We develop the mathematics of gradient-driven lattice densification, show that the energy budget closes with a modest lattice perturbation of 0.6–6%, and derive five observable predictions distinguishing the lattice model from standard thermal explanations. A specific experimental test — broadband electromagnetic monitoring phase-locked to the acoustic driving frequency — is proposed as a decisive discriminator. Convergence with recent analog gravity treatments of sonoluminescence (Karmakar and Maity, Physical Review D, 2024) and observations of sub-Poissonian photon statistics (Rezaee et al., 2022) provides additional structural support. The framework predicts that sonoluminescence and the anomalous brightness of high-redshift galaxies observed by JWST are the same phenomenon at different scales: squeeze the fabric hard enough, and what was dark becomes light. Three free parameters. Five distinguishing predictions. One singing bubble.