We have always used ESU Loksound decoders in our models. We program the decoders with our own sound and running settings. If you ever have an issue just do CV8.
Herewith a couple of videos showing our UK models running with sound.
The first video is on 0 gauge railway, Bucks Hill and the second is on 0 gauge railway Over Peover. The loco's on the second video are 3 cylinder, hence the 6 beats per revolution of the wheels.