what i need for sound n gauge

[popsssss]

right now i havee 3 main lines all analog controllers.  2 locos have.dcc.i not lookin to run more than 1 train on each linee  heres my question   i want sound . what do i need to get.  locos? controllers?  anything else.

[Trainman203]

You either need sound decoders in your present engines or DCC engines with sound.  You need a DCC command station and cabs.