idlemarvel
Neither idle nor a marvel
Yes, Massoth e-motion S decoder would work, it would probably be connected to the track power outlets on the LGB boards. There's a trick to programming them once installed, to isolate the power, as they share some of the same CVs as the LGB fitted decoders. You would need a speaker as well, and a volume control if you want to control the volume manually as well as with CV settings The speakers and volume control from Massoth come with the plugs attached to plug into the S decoder board.
If you're happy with generic motor sound, you could try the LGB diesel sound module 65006 which has a speaker and volume control included. The sound functionality is more of less the same as the S decoder. Again no soldering required.
HTH
If you're happy with generic motor sound, you could try the LGB diesel sound module 65006 which has a speaker and volume control included. The sound functionality is more of less the same as the S decoder. Again no soldering required.
HTH