Everything Sings: Frequency as the Universal Language of Harmonic Selection

"Everything sings" is not metaphor. It is physics. All phenomena—sound, light, gravitational waves, nuclear configurations, biological rhythms—are frequency propagating through filtering media. The Theory of Existing proposes that reality metabolizes potential into structure through harmonic selection. This paper demonstrates that frequency is the universal language through which this metabolism operates. Sound moves through air and auditory systems, revealing consonant ratios (2:1, 3:2) as acoustic stability attractors—explaining why certain intervals sound "good" across all human cultures. Gravitational waves move through viscous spacetime, revealing φ (1.618) as cosmic stability attractor (p < 0.001, 68 events analyzed). Nuclear configurations exist within strong and electromagnetic force interplay, revealing magic numbers (2, 8, 20, 28, 50, 82, 126) as nuclear stability attractors. Light moves through structured space—per Harvard's February 2026 Montgomery effect demonstration—and we predict will reveal φ-organization when appropriately analyzed. The unifying principle: frequency moves through filtering media; what survives is structure. Consonance in music, φ in mergers, magic in nuclei—these are the same phenomenon at different scales. Reality is frequency. Media are filters. Structure is what remains. This paper unifies acoustics, optics, gravitational wave physics, and nuclear physics under a single framework, demonstrating that "everything sings" is the shortest accurate statement of how reality maintains itself through continuous harmonic processing.