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Four defects in the graph builders, all found by review rather than by ear. **Reverb was unusable at its own defaults.** A ConvolverNode applies the impulse's gain whole — the graph sets `normalize = false` so a room is deterministic rather than browser-defined — but the impulse was raw decaying noise. Measured L2 at the registry default (size 0.7 / damping 0.5): 46.4, or +33.3 dB, putting the wet path ~24 dB over dry at the default `wet: 0.35`. It is now normalised to unit energy, so the wet knob means what it says. Preview and render both convolve this buffer, so they stayed identical throughout — equally deafening before, equally correct now. **Phaser in_gain/out_gain trim the signal entering and leaving the effect**, not a wet/dry pair. Wired to the wet and dry legs, "Input" muted the dry path and the two defaults summed to 1.14, so inserting a phaser raised the track level. They are now input and output trims with the legs summed at unity. Its declared waveform is also honoured: `lfo.type` was never assigned, so the default "Triangular" was silently a sine. **The dynamics worklets held one envelope across a channel-major loop.** The followers advance per sample, so on stereo a 20 ms attack behaved as 10 ms, and the right channel's gain came from an envelope that had already traversed the left — the two ducked differently from the same input and the image pumped. State is now per channel, as is the gate's smoothed gain and bitcrush's sample-hold counter, which previously advanced only on the last channel and left every earlier one frozen for a whole quantum. The gate also honours the knee it declares instead of chattering on material sitting at the threshold. **A one-pole filter's cutoff was swallowed in preview.** Its coefficients are fixed at construction, so `update` cannot push a new frequency — but the shape signature carried only type and pole count, so a cutoff change looked like a values-only edit and went into a no-op updater. Preview kept filtering at the old frequency while the render used the new one: a preview/render divergence in exactly the two effects that do not use a BiquadFilterNode. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>