Sealed Enclosure Target Qtc (Bessel / Butterworth), Isothermal Stuffing & Step-Response Designer

Deterministic Adiabatic-to-isothermal gas heat-capacity ratio gamma (1.40 -> 1.12) apparent compliance gain + 2nd-order step-response overshoot solver engine (.pdf, .svg, .json, .csv) built for ATC Loudspeakers, Neumann KH, Scan-Speak, Acousta-Stuf — zero-upload ephemeral Wasm RAM execution.

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