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Vance Ingalls
f59612850d
One graph builder per `web` id, turning the registry's declarations into running audio. Every node exposes `update`, so turning a dial re-parameterises the live graph rather than rebuilding it: an AudioParam change lands on the next 128-sample quantum, about 2.7 ms at 48 kHz. `buildFxChain` reports whether an update could be applied in place — adding or bypassing an effect, or switching a filter between one and two poles (which changes the node type from BiquadFilterNode to IIRFilterNode), changes the graph's shape and returns false so the caller rebuilds. Four effects have no native node and run as AudioWorklet processors: compressor, limiter, gate and bitcrush. The module is registered from a data: URL rather than a blob:, because a blob inherits the page origin and is opaque on a file:// page, where it fails with an unhelpful AbortError. Reverb has no single node either. `synthesizeReverbImpulse` generates a tail from the room parameters, seeded so the same room sounds the same on every machine, and the ConvolverNode uses it. Tests cover the wiring — which nodes get built, how they connect, parameter application and clamping, in-place update versus rebuild, disposal — against a fake AudioContext, since happy-dom has no Web Audio.