Adding an item to rateUpdates every time setRate method is called

Author: pavle-goloskokovic

v3/src/sound/webaudio/WebAudioSound.js

@@ -173,6 +173,10 @@ var WebAudioSound = new Class({
         if (this.source) {
             this.source.playbackRate.setValueAtTime(this.totalRate, 0);
         }
+        this.rateUpdates.push({
+            time: this.manager.context.currentTime,
+            rate: this.totalRate
+        });
     }
 });
 /**