Piezo Pickup Capacitance vs Preamp Input-Impedance (1M vs 10M Ohm) Bass-Loss & Buffer Designer

Deterministic 1st-order capacitive-source high-pass corner f_c = 1 / (2*pi*R_in*(C_piezo + C_cable)) + JFET bootstrap / charge-amp noise model engine (.svg, .pdf, .json) built for K&K Sound, L.R. Baggs, Fishman, Grace Design — zero-upload ephemeral Wasm RAM execution.

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