Is there a rule for a whistle at stations to tell trains they can go?
To answer the original query, (before it was highjacked by discussions concerning crossings, etc.,

) to make your own station master/guard whistle (or any other sound) try this:
1. You will require a mic (they are not expensive if you need to purchase one).
2. You will need a whistle of course.
3. You will also need to download "Play a Sound" file kuid:121843:90003:1 by "pitkin" if not already held.
4. Open the following: C:\Documents and Settings\All Users\Start Menu\Programs\Accessories\Entertainment\Sound Recorder. A small window "Sound-Sound Recorder" should appear on screen.
5. Left click (LC) "Edit" and LC "Audio Properties". Ensure the following:
a. "Sound playback" is showing "C-Media Wave Device".
b. "Sound recording" is showing the mic that you have installed (for example: "AK5370"). (This is one that I use from Logitech).
c. "MIDI music playback" is showing "Microsoft GS Wavetable SW Synth".
6. Check the volume settings of each of the above. My personal preference is to set them as follows: a. and c. to maximum and b.
very low (you may need to experiment with b.). LC "OK".
7. In the "Sound-Sound Recorder" window "Effects" there are aids to adjusting the recording including echo effect which can be applied to give a large station or terminus sound effect. (The more times you add the echo to the recording the larger the station sounds

).
8. Make the recording as required and when satisfied LC on "File" and name it as required. Ensure to note where you save this file!
9. Open Content Manager and search for "Play a Sound".
10. LC "Edit" and "Edit in Explorer". "Play a sound file" opens and you will see some sound files already there.
11. Now copy your recorded sound file and paste it into "play a sound file". Close the file and "commit" (LC "Edit" to do this).
12. In Trainz - Go to "Edit Session" and open "Edit" in "Driver Command". Tick "Play a Sound File". Now go to "Edit" in "Driver Setup" and LC "Play a sound file>" and LC your sound file.
I hope this is of help and you can add any sound recording using this method. There may be other ways to do this but I find this method easy for me!
David
Happiness is green all the way!