Fix RTA peak hold and FFT band energy

scripts/test_fft_band_energy.mjs

@@ -0,0 +1,26 @@
+import assert from 'node:assert/strict';
+import { buildBandBinMapping, computeBandLevels } from '../www/core/utils.js';
+
+const band = [{ center: 1000, fLo: 875, fHi: 1125 }];
+
+for (const binCount of [2048, 4096, 8192, 16384]) {
+  const nyquist = 24000;
+  const binWidth = nyquist / binCount;
+  const mapping = buildBandBinMapping(band, nyquist, binCount);
+  const totalWeight = mapping[0].bins.reduce((sum, bin) => sum + bin.weight, 0);
+  assert.ok(
+    Math.abs(totalWeight * binWidth - 250) < 1e-6,
+    `bin overlaps must cover the complete band at FFT size ${binCount * 2}`,
+  );
+
+  // Constant power density: every bin contains density × bin width. The
+  // integrated band level must therefore be independent of FFT resolution.
+  const binPower = binWidth * 1e-6;
+  const binsDb = new Float32Array(binCount);
+  binsDb.fill(10 * Math.log10(binPower));
+  const level = computeBandLevels(mapping, binsDb)[0];
+  const expected = 10 * Math.log10(250e-6);
+  assert.ok(Math.abs(level - expected) < 1e-5, `FFT size ${binCount * 2}: ${level} vs ${expected}`);
+}
+
+console.log('FFT band-energy regression tests passed');

scripts/test_rta_profile.mjs

@@ -22,6 +22,9 @@ const forced = context.buildRtaRuntimeConfig({
   RTA_FREQ_RANGE: 'lf',
   RTA_IIR_ORDER: 2,
   RTA_DETECTOR: 'peak',
+  RTA_PEAK_HOLD_MODE: 'manual',
+  RTA_PEAK_HOLD_SEC: 4,
+  RTA_PEAK_RESET_TOKEN: 9,
   CORR_RESPONSE_S: 2.5,
   CORR_RESET_TOKEN: 7,
   XY_POINTS: 256,
@@ -31,6 +34,9 @@ assert.equal(forced.bpo, '1_12');
 assert.equal(forced.freqRange, 'norm');
 assert.equal(forced.order, 6);
 assert.equal(forced.detector, 'peak');
+assert.equal(forced.rtaPeakHoldMode, 'manual');
+assert.equal(forced.rtaPeakHoldSeconds, 4);
+assert.equal(forced.rtaPeakResetToken, 9);
 assert.equal(forced.tauFast, 0.125);
 assert.equal(forced.rtwCenters.length, 121);
 assert.equal(forced.correlationResponseS, 2.5);