I have quite a few locos with Zimo sound decoders in them - I have remapped sounds to get them on easily accessible buttons - horns and whistles, brakes, drain cocks, fireman shovelling, blowers and injectors on steam locos - try to standardise sounds and functions to specific buttons - sound on/off F1, brakes F2, horns and whistles on F3 and F4 and so on…..