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VCS3, EDP Wasp
\n**Key difference from Moog**: stages are bidirectionally coupled — no unity-gain buffers between them (unlike Moog), so each stage loads its neighbors; solved as one tridiagonal system per sample (Thomas algorithm) instead of Moog's simple forward cascade
\n**Character**: preserves more bass at high resonance than Moog — closed-form DC gain $1/(1 + 4\\cdot\\text{resonance})$ vs Moog's $1/(1 + 4\\cdot\\text{resonance}\\cdot(1+G+G^2+G^3+G^4))$, $G<1$ — and more \"squelchy\"/aggressive due to the per-stage $\\tanh$
\n**Implementation**: ZDF (zero-delay feedback) via trapezoidal integration — Zavalishin, *The Art of VA Filter Design* (2012); Pirkle, *Designing Audio Effect Plugins in C++*, 2nd ed. (2019), Ch. 10
\n**Stability**: bounded (per-stage $\\tanh$-saturated) across the documented 0–1 range and well beyond; self-oscillates near resonance≈1.15–1.2 — higher than Moog's exact 1, since the extra per-stage $\\tanh$ adds damping\n\n```js\nlet params = { fc: 500, resonance: 0.8, fs: 44100 }\ndiodeLadder(buffer, params)\n```\n\n| Param | Default | |\n|---|---|---|\n| `fc` | `1000` | cutoff frequency, Hz |\n| `resonance` | `0` | 0–1; feedback k = 4·resonance (same mapping as `moogLadder`); self-oscillates near ≈1.15–1.2 |\n| `fs` | `44100` | sample rate, Hz |\n| `drive` | `1` | input gain into each stage's tanh saturation; `0` mutes the signal |\n\nPass the same `params` object on every call to persist the 4 stage states across blocks.\n\n**Use when:** acid basslines, squelchy synth leads — resonance character that stays bounded (not self-oscillating) across most of the range, unlike `moogLadder`.\n\n---\n\nPart of [@audio/filter](https://github.com/audiojs/filter) — the filter family umbrella. This README is generated from the umbrella docs.\n\nMIT © [audiojs](https://github.com/audiojs)\n","readmeFilename":"README.md"}