slightly better

public/worklets/output-limiter.js

@@ -0,0 +1,60 @@
+class OutputLimiter extends AudioWorkletProcessor {
+  static get parameterDescriptors() {
+    return [
+      {
+        name: 'threshold',
+        defaultValue: 0.8,
+        minValue: 0.1,
+        maxValue: 1.0,
+        automationRate: 'k-rate'
+      },
+      {
+        name: 'makeup',
+        defaultValue: 1.5,
+        minValue: 1.0,
+        maxValue: 3.0,
+        automationRate: 'k-rate'
+      }
+    ]
+  }
+
+  constructor() {
+    super()
+  }
+
+  softClip(x, threshold) {
+    if (Math.abs(x) < threshold) {
+      return x
+    }
+    const sign = x < 0 ? -1 : 1
+    const scaled = (Math.abs(x) - threshold) / (1 - threshold)
+    return sign * (threshold + (1 - threshold) * Math.tanh(scaled))
+  }
+
+  process(inputs, outputs, parameters) {
+    const input = inputs[0]
+    const output = outputs[0]
+
+    if (input.length === 0 || output.length === 0) {
+      return true
+    }
+
+    const threshold = parameters.threshold[0]
+    const makeup = parameters.makeup[0]
+
+    for (let channel = 0; channel < input.length; channel++) {
+      const inputChannel = input[channel]
+      const outputChannel = output[channel]
+
+      for (let i = 0; i < inputChannel.length; i++) {
+        let sample = inputChannel[i] * makeup
+        sample = this.softClip(sample, threshold)
+        outputChannel[i] = sample
+      }
+    }
+
+    return true
+  }
+}
+
+registerProcessor('output-limiter', OutputLimiter)