Moves the sound notification code to be played when the participant joins / leaves the room instead of receiving add / remove stream event.

index.html

     <script src="libs/popover.js?v=1"></script><!-- bootstrap tooltip lib -->
     <script src="libs/toastr.js?v=1"></script><!-- notifications lib -->
     <script src="interface_config.js?v=5"></script>
-    <script src="libs/app.bundle.js?v=76"></script>
+    <script src="libs/app.bundle.js?v=77"></script>
     <script src="analytics.js?v=1"></script><!-- google analytics plugin -->
     <link rel="stylesheet" href="css/font.css?v=7"/>
     <link rel="stylesheet" href="css/toastr.css?v=1">

modules/UI/UI.js

     messageHandler.notify(displayName,'notify.somebody',
         'disconnected',
         'notify.disconnected');
+    if(!config.startAudioMuted ||
+        config.startAudioMuted > APP.members.size())
+        UIUtil.playSoundNotification('userLeft');
     // Need to call this with a slight delay, otherwise the element couldn't be
     // found for some reason.
     // XXX(gp) it works fine without the timeout for me (with Chrome 38).
         'connected',
         'notify.connected');
 
+    if(!config.startAudioMuted ||
+        config.startAudioMuted > APP.members.size())
+        UIUtil.playSoundNotification('userJoined');
     // Add Peer's container
     VideoLayout.ensurePeerContainerExists(jid,id);
 }

modules/UI/videolayout/VideoLayout.js

  */
 var focusedVideoInfo = null;
 
-/**
- * Indicates if we have muted our audio before the conference has started.
- * @type {boolean}
- */
-var preMuted = false;
-
 var mutedAudios = {};
 
 var flipXLocalVideo = true;
             container.id = 'mixedstream';
             container.className = 'videocontainer';
             remotes.appendChild(container);
-            if(!config.startAudioMuted ||
-                config.startAudioMuted > APP.members.size())
-                UIUtil.playSoundNotification('userJoined');
         }
 
         if (container) {
             // Remove whole container
             container.remove();
 
-            if(!config.startAudioMuted ||
-                config.startAudioMuted > APP.members.size())
-                UIUtil.playSoundNotification('userLeft');
             VideoLayout.resizeThumbnails();
         }