Hands on the EQ curve: N draggable band handles over the eq-display response, wheel for Q, full keyboard access per band, and two readings of the same band model — parametric (curve plus handles) or bars (columns standing at their own frequencies with the curve behind them). Controlled, with the band model, hit testing and step maths in a pure core beside it.
pnpm dlx shadcn@latest add "https://pluginui.com/r/core-eq-editor.json"