Ajout du sampler et de l'input

src/lib/audio/processors/StereoWidener.ts

@@ -0,0 +1,31 @@
+import type { AudioProcessor } from "./AudioProcessor";
+
+export class StereoWidener implements AudioProcessor {
+  getName(): string {
+    return "Stereo Widener";
+  }
+
+  getDescription(): string {
+    return "Expands stereo field using mid-side processing";
+  }
+
+  async process(
+    leftChannel: Float32Array,
+    rightChannel: Float32Array
+  ): Promise<[Float32Array, Float32Array]> {
+    const widthFactor = 1.5 + Math.random() * 1.5;
+
+    const newLeft = new Float32Array(leftChannel.length);
+    const newRight = new Float32Array(rightChannel.length);
+
+    for (let i = 0; i < leftChannel.length; i++) {
+      const mid = (leftChannel[i] + rightChannel[i]) * 0.5;
+      const side = (leftChannel[i] - rightChannel[i]) * 0.5 * widthFactor;
+
+      newLeft[i] = mid + side;
+      newRight[i] = mid - side;
+    }
+
+    return [newLeft, newRight];
+  }
+}