Index: RunActivity/Viewer3D/Processes/SoundProcess.cs
===================================================================
--- RunActivity/Viewer3D/Processes/SoundProcess.cs	(revision 4323)
+++ RunActivity/Viewer3D/Processes/SoundProcess.cs	(working copy)
@@ -182,11 +182,9 @@
                                     if (!sources.Value[i].NeedsFrequentUpdate && UpdateCounter > 0)
                                         continue;
 
-                                    if (!sources.Value[i].Update() && viewer.Simulator.GameSpeed <= 1)
+                                    if (!sources.Value[i].Update())
                                     {
-                                        Trace.TraceInformation("Sound Update return False");
-                                        // This doesn't seem to be needed - cleanup when a train is removed seems to do it anyway.
-                                        //removals.Add(new KeyValuePair<object, SoundSourceBase>(sources.Key, sources.Value[i]));
+                                        removals.Add(new KeyValuePair<object, SoundSourceBase>(sources.Key, sources.Value[i]));
                                     }
                                 }
                             }