I have an older Polar Express that only had a whistle and bell. I added a sound card in the tender with 'crew talk' and simulated steam sounds.
The add on passenger car has Tom Hanks voice saying, " All aboard, this is the Polar Express."
Thats why I use the CW-80 transformer as it has a bell and whistle button to activate these features.
I am planning on a 10'X32' layout in the basement.
