Index: trunk/src/org/openstreetmap/josm/io/audio/AudioPlayer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/audio/AudioPlayer.java	(revision 14194)
+++ trunk/src/org/openstreetmap/josm/io/audio/AudioPlayer.java	(revision 14195)
@@ -48,5 +48,5 @@
 
     private State state;
-    private static Class<? extends SoundPlayer> soundPlayerClass;
+    private static volatile Class<? extends SoundPlayer> soundPlayerClass;
     private SoundPlayer soundPlayer;
     private URL playingUrl;