This latest batch of 2-10-2's come with a tender with a DigiTrax Feature only function decoder, BUT the tender floor has openings
and the interface is the Standard NMRA 8 pin small, it might be possible to convert this to a sound decoder if you can fine one with a small enough speaker to fit, but that conversion we leave up to you using whatever brand of sound Decoder you prefer 
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Also don't forget the Labelle # 430-000135 Track Cleaner and Conditioner with leaves a conductive film on your track for better "DCC" running which eliminates "headlight flicker"