Working on processors a tiny bit

src/lib/audio/processors/PanLeftToRight.ts

@@ -0,0 +1,34 @@
+import type { AudioProcessor, ProcessorCategory } from './AudioProcessor';
+
+export class PanLeftToRight implements AudioProcessor {
+	getName(): string {
+		return 'Pan L→R';
+	}
+
+	getDescription(): string {
+		return 'Gradually pans the sound from left to right';
+	}
+
+	getCategory(): ProcessorCategory {
+		return 'Space';
+	}
+
+	process(leftIn: Float32Array, rightIn: Float32Array): [Float32Array, Float32Array] {
+		const length = leftIn.length;
+		const leftOut = new Float32Array(length);
+		const rightOut = new Float32Array(length);
+
+		for (let i = 0; i < length; i++) {
+			const t = i / length;
+			const panAngle = t * Math.PI * 0.5;
+			const leftGain = Math.cos(panAngle);
+			const rightGain = Math.sin(panAngle);
+
+			const mono = (leftIn[i] + rightIn[i]) * 0.5;
+			leftOut[i] = mono * leftGain;
+			rightOut[i] = mono * rightGain;
+		}
+
+		return [leftOut, rightOut];
+	}
+}