diff --git a/java/libraries/sound/src/processing/sound/Engine.java b/java/libraries/sound/src/processing/sound/Engine.java
index b650b4c3e..95b75eea6 100644
--- a/java/libraries/sound/src/processing/sound/Engine.java
+++ b/java/libraries/sound/src/processing/sound/Engine.java
@@ -220,7 +220,7 @@ public class Engine {
 	// Mix
 
   	public static int[] mixPlay(int[] input, float[] amp){
-  		// return methCla.mixPlay(input, amp);
+  		return methCla.mixPlay(input, amp);
   	};
   
 	// Amplitude Follower