more engines

src/lib/audio/engines/FourOpFM.ts

@@ -189,6 +189,23 @@ export class FourOpFM implements SynthEngine<FourOpFMParams> {
       lfoPhaseR += (TAU * params.lfo.rate) / sampleRate;
     }
 
+    // Peak normalization with headroom
+    let peakL = 0;
+    let peakR = 0;
+    for (let i = 0; i < numSamples; i++) {
+      peakL = Math.max(peakL, Math.abs(leftBuffer[i]));
+      peakR = Math.max(peakR, Math.abs(rightBuffer[i]));
+    }
+    const peak = Math.max(peakL, peakR);
+
+    if (peak > 0.001) {
+      const normalizeGain = 0.85 / peak;
+      for (let i = 0; i < numSamples; i++) {
+        leftBuffer[i] *= normalizeGain;
+        rightBuffer[i] *= normalizeGain;
+      }
+    }
+
     return [leftBuffer, rightBuffer];
   }