--- old/src/java.desktop/share/classes/javax/sound/midi/Sequence.java	2016-05-17 17:13:15.000000000 +0300
+++ new/src/java.desktop/share/classes/javax/sound/midi/Sequence.java	2016-05-17 17:13:15.000000000 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -266,11 +266,7 @@
      * @see #getTracks
      */
     public boolean deleteTrack(Track track) {
-
-        synchronized(tracks) {
-
-            return tracks.removeElement(track);
-        }
+        return tracks.removeElement(track);
     }
 
     /**
@@ -282,8 +278,7 @@
      * @see #deleteTrack
      */
     public Track[] getTracks() {
-
-        return tracks.toArray(new Track[tracks.size()]);
+        return tracks.toArray(new Track[0]);
     }
 
     /**