BaseSound.config now contains all defaults. Fix phaserjs#3525

Author: photonstorm

src/sound/BaseSound.js

@@ -120,10 +120,15 @@ var BaseSound = new Class({
          * @since 3.0.0
          */
         this.config = {
-            /**
-             * Initializing delay config setting
-             */
+
+            mute: false,
+            volume: 1,
+            rate: 1,
+            detune: 0,
+            seek: 0,
+            loop: false,
             delay: 0
+
         };
 
         /**

src/sound/webaudio/WebAudioSound.js

@@ -541,7 +541,7 @@ var WebAudioSound = new Class({
 
         var now = this.manager.context.currentTime;
 
-        if (this.source)
+        if (this.source && typeof this.totalRate === 'number')
         {
             this.source.playbackRate.setValueAtTime(this.totalRate, now);
         }