perf: harden realtime localization pipeline

packages/webgpu-kernels/das.js

@@ -3,7 +3,11 @@ import {
   estimateDasWorkload,
   finalizeDasBands,
 } from "../acoustics-core/das.js";
-import { interpolateFrequencyResponse } from "../acoustics-core/frequency-response.js";
+import {
+  interpolateFrequencyResponse,
+  inverseResponseGainDb,
+  requireMaxCompensationDb,
+} from "../acoustics-core/frequency-response.js";
 import { dbToLinear } from "../acoustics-core/math.js";
 import { extractStftBins } from "../acoustics-core/stft.js";
 import {
@@ -77,6 +81,7 @@ export function packStftBatch(stft, bins, options = {}) {
   const packed = new Float32Array(bins.length * valuesPerBin * 2);
   const microphones = options.microphones;
   const compensateFrequencyResponse = options.compensateFrequencyResponse !== false;
+  const maxCompensationDb = requireMaxCompensationDb(options.maxCompensationDb);
   const hasFrequencyResponse =
     compensateFrequencyResponse &&
     Array.isArray(microphones) &&
@@ -100,7 +105,9 @@ export function packStftBatch(stft, bins, options = {}) {
       microphones.forEach((microphone, microphoneIndex) => {
         if (!Array.isArray(microphone.frequencyResponse)) return;
         interpolateFrequencyResponse(microphone.frequencyResponse, frequencyHz, response);
-        const inverseGain = dbToLinear(-response.gainDb);
+        const inverseGain = dbToLinear(
+          inverseResponseGainDb(response.gainDb, maxCompensationDb),
+        );
         const responseOffset = (binIndex * stft.microphoneCount + microphoneIndex) * 2;
         inverseResponses[responseOffset] = inverseGain * Math.cos(response.phaseRadians);
         inverseResponses[responseOffset + 1] = -inverseGain * Math.sin(response.phaseRadians);
@@ -541,6 +548,7 @@ export async function computeDasWebGpu(options) {
         fftSize: experiment.stft.fftSize,
         compensateFrequencyResponse:
           experiment.beamforming.compensateFrequencyResponse !== false,
+        maxCompensationDb: experiment.beamforming.maxCompensationDb,
       });
       stftMs += now() - stftStartedAt;
       const binIndices = Uint32Array.from(batchBins);