I'd like to add a sound decoder to a Hawthorne Village train and I'm hoping Soundtraxx has recordings from the original locomotive.
The Tsunami2 gives you something like 60 whistles and 9 or so different chuffs. You'll find one in there that sounds appropriate to your ears. I've read the mogul is based off of a Colorado & Southern mogul. Here's a link to a YouTube video of C&S #9 running on the Georgetown Loop RR.
https://www.youtube.com/watch?v=cfxmBEqMLRw
With the number of chuffs available, speaker selection, and EQ settings, you can tune the decoder to be pretty close to this prototype if you'd like, or you may find you like something completely different.
Later,
K