Well, I down loaded and installed the new 4.0 system in the TIU and Remote. And since I couldn't wait to try it out, I unpacked my engine and tender and set them on the track. The first thing I noticed was that the sound was louder and clearer, the smoke unit seemed to function normaly, and the throttle response is instant!!!!!!!!!
As the train traveled around the loop, the sound di sem louder than before, and when I pushed the Protocast button, the response was faster, and when I made an announcement thru the remote mic, the engine sound din't quit, but the announcement was much louder and almost "echoed" over the engine sounds. I called fro my duaghter who was up stairs and when she came downstairs, she said that it was much louder than before and clearer. Then engine sounds did lower a little, but they did not go toatally mute. The staic noise didn't seem to last as long either.
I also noticed that the bell and whistle commands are more "instant". i even tried the PFA button and the PFA announcements are a little louder and clearer.
All in all, I am very pleased with the software update. just thought I would share this.