This little Aristocraft lil’critter was converted to DCC control with sound, for the install I used a Soundtrax Tsunami 2 decoder. the challenge was speaker placement, I used a micro speaker from a computer monitor, that was already placed in a sound box to amplify it. which I simply cut the mounting ears off, then fit into the roof the engine cover.
This was after mounting the decoder to the chassis and figuring out the wiring for the motor block and power pick. the decoder mounted to the chassis
anyway, after all, was said and done, I played with a few different sounds and settled on the one in the video