There are no dumb questions, just dumb answers. Like this one from a guy that dose not know much about DCC. The speakers are in the train for train sounds. On the lay out for other sounds like grade crossings. I think the Chip and speaker are put in the loco if there is room. If not it can be put in the tender, or a box car that will be pulled right behind the loco. DCC guy's, If this is not right let me know so I can correct it.When you are using sound chips where exactly is the sound you hear coming from? Is there a speaker hidden somewhere? is it on the layout or the train? Do you use more then one?