I would like some info on DCC and Sound boards to install on this unit, I have recently purchased and understand that it is dcc ready.  looking for some advice. tks jay

Sirs:
  I have several N scale Precision Craft Model E7A sound equipped for dc & dcc units,  using the Bachmann E-Z command control center model #44901, while running my units and attempted to see what sounds function I have inadvertently seemed to have shut them off.  Reading all the inst for the unit and the command co9ntrol center I can not see how to get the sound function back on.  Additionally the only sounds that appeared to function were the Bell and Horn?  Can you advise me on how to get sound turned back on, and what to do to get the sound for diesel, brake squeal and other sounds associated with the Precision Craft Model to function. V/R J M Redway Jr