Harp, Zither & Dulcimer String Tensile Breakage Safety Calculator

Deterministic Mersenne Density-Independent Wave Stress Formula `σ = 4 * ρ * L² * f²` engine (.wav, mic) built for Lyon & Healy, Salvi Harps, Camac, Dusty Strings — zero-upload ephemeral Wasm RAM execution.

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