All of the LC engines I have seem to have 4 pins. I don't have the particular engine to confirm. In any case, it was discussed in another thread a while back, that the pin-out for each engine can be different. (2 pins for speaker, 2 pins for electro coupler on LC+) The easiest way to do what you want would be to open the tender and place the switch on one of the wires there. As mentioned, all that is inside the tender is the speaker.
There is no way to selectively choose which sounds play and which do not. As I said in your other thread, it is all or nothing. ...
Now if you want to get real complex you could, but I don't think it's worth the time to create your own sound board for a starter set engine... unless you think that sounds like fun.
JGL
