The 132 Hz fundamental drive of the phi‑coupled E8 spinor lattice generates a cascade of phononic modes whose frequency ratios follow the golden ratio, producing resonant nodes that map directly onto rational points of the unit circle via stereographic projection. This physical mapping encodes the entire primitive Pythagorean triple tree: each resonant bifurcation yields a new integer pair (a,b) that satisfies a² + b² = c², and the hierarchy of bandgaps controls the order of generation, effectively turning the lattice into an analog sieve for Diophantine solutions. Consequently, the E8 lattice provides a unified geometric‑frequency principle that predicts and constructs primitive triples without algebraic computation, revealing a deep link between root‑vector geometry, phi‑scaled spectra, and integer number theory.Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com