Steam Module and Sounds

I am new to model trains and I think this is the way to go, so would like to go this way instead of DCC, Since I don't have any control system yet for my trains, I thought I would just invest in this technology instead of others since I am starting with nothing. .Most of the locomotives that I have collected so far are steam locos. I was wondering if there was a release date for the module with Steam locomotive sound decoders? I am especially interested in British Steam engines such as the Flying Scotsman or the Mallard but any steam sounds will work.

I was also interested to know if the diesel module be used for a steam loco by simply changing the sounds?

Thank you for any help.

Mike B.