Correct RTA detector timing and peak integration

www/views/realtime.js

@@ -31,10 +31,9 @@ const PEAK_HOLD_MAP = new Map(Object.entries({
 }));
 
 const INTEGRATION_TAU = {
-  impulse: 0.035,
   fast: 0.125,
+  medium: 0.5,
   slow: 1.0,
-  peak: 0.01,
 };
 
 
@@ -283,6 +282,7 @@ function buildConfigSignature(CONFIG, nyq, binCount) {
     CONFIG.RTA_BPO_MODE,
     CONFIG.RTA_WEIGHTING,
     CONFIG.RTA_BAR_LAYOUT,
+    CONFIG.RTA_DETECTOR,
     CONFIG.RTA_INTEGRATION,
     CONFIG.RTA_PEAK_HOLD_MODE,
     CONFIG.RTA_PEAK_HOLD_SEC,
@@ -383,15 +383,14 @@ function computeBandLevels(state, utils, buf, CONFIG, range) {
 }
 
 function applyIntegration(state, levels, CONFIG, range) {
-  const mode = (CONFIG.RTA_INTEGRATION && INTEGRATION_TAU[CONFIG.RTA_INTEGRATION])
+  const mode = (CONFIG.RTA_INTEGRATION === 'impulse' || INTEGRATION_TAU[CONFIG.RTA_INTEGRATION])
     ? CONFIG.RTA_INTEGRATION
     : 'fast';
-  const tau = INTEGRATION_TAU[mode] || 0.125;
+  const peakDetector = CONFIG.RTA_DETECTOR === 'peak';
   const now = performance.now();
   const last = state.lastIntegrationTs || now;
   const dt = Math.max(1 / 240, (now - last) / 1000);
   state.lastIntegrationTs = now;
-  const alpha = (tau > 0 && dt > 0) ? 1 - Math.exp(-dt / tau) : 1;
 
   if (!state.ewma || state.ewma.length !== levels.length) {
     state.ewma = new Float32Array(levels.length);
@@ -400,6 +399,10 @@ function applyIntegration(state, levels, CONFIG, range) {
   const buffer = state.ewma;
   for (let i = 0; i < levels.length; i++) {
     const prev = buffer[i];
+    const tau = peakDetector
+      ? 0.010
+      : (mode === 'impulse' ? (levels[i] >= prev ? 0.035 : 1.5) : (INTEGRATION_TAU[mode] || 0.125));
+    const alpha = (tau > 0 && dt > 0) ? 1 - Math.exp(-dt / tau) : 1;
     buffer[i] = prev + (levels[i] - prev) * alpha;
   }
   return buffer;