Index: trunk/test/tmcsim/cadsimulator/SoundPlayerTest.java
===================================================================
--- trunk/test/tmcsim/cadsimulator/SoundPlayerTest.java	(revision 16)
+++ trunk/test/tmcsim/cadsimulator/SoundPlayerTest.java	(revision 51)
@@ -36,4 +36,7 @@
         System.out.println("run");
         Vector dummy = new Vector();
+        // the frog clip is actually 3 seconds long, but we specify clip duration of 2
+        // to demonstrate that the subsequent clip will start before the first one finishes.
+        // This shows that SoundPlayer assumes correct clip durations.
         IncidentEvent evt1 = new IncidentEvent(0, null, "frog-croak.mp3", 2, dummy, dummy);
         IncidentEvent evt2 = new IncidentEvent(0, null, "bikehorn.mp3", 1, dummy, dummy);