Also, caution, I just checked your sound file, and as I suspected, you too are a victim of the bad sound file problem of the Heavy Pacifics all released with steaming whistle have a flaw where if you enable quilling whistle SPW and then play the PFA sequence, just before the engine takes off and plays the 2 toots for forward there will be an ear shattering beep or noise from the speaker. If you just have the whistle in normal non-quilling mode and start the sequence, it hopefully does not invoke the ear shattering beep.
Again, downloaded your sound file https://mthtrains.com/20-3811-1 and checked that it does have a bad segment 241.
I've tried contacting MTH, I've tried getting dealers involved. I personally have 2 engines and $2600 tied up in this mess.
https://ogrforum.com/...6#163180074756537156
Even @Allan Miller has one of these engines and even though he hasn't said it, the sound file certainly checks out to have the bug
https://ogrforum.com/...5#164024807343089535
MTH has had since I reported this on 7/28/2022 to acknowledge it, and then actually commit to doing something about it. Meanwhile dealers keep selling these and shipping them and honestly, if push comes to shove and people get angry and return bad programmed engines at dealer expense, this is going to be one heck of a mess.
So yeah, if you cannot get steaming whistle to work, and you now know about this sound problem- you have plenty of justification to send that thing back.