Sound in ai battleships? MSFS provided a few direct paths to learning the SDK, through "easter eggs" and tutorials, like the DC-3 and the Enterprise. They practically beg us to modify these objects and they give examples of how to. Using these clues, I have extensively reworked default models and default processes and added them to mine and other peoples' models. Successfully matching the default IFLOLS effect and cables to the Vik is one example. In fact, I am absolutely certain you can substitute different effects, including sounds, because I've done it myself.
I have edited and attached sounds to ai models in commercial releases. The link is to a development video that demonstrates issues between the software module and my applied ai sound. The issue was resolved and the addon has been published.
I don't know about any ai battleships with sound, certainly no default ones. Your procedure is less than vague, so I can't comment on that.
MCX doesn't do anything on it's own, aside from allowing us to modify models, without learning as much as previous developers needed to know, before beginning. Almost every functionality of MCX comes from the SDK, Arno has added some image manipulation, some collatibility, a lot of cool little features, actually, but MCX doesn't do anything the original MSFS dev team couldn't do without MCX and there is nothing MCX can do to a model, that a developer could not do independently, using the tools already provided in the SDK. In short, MCX is a macros, it is a GUI to call tools that already exist. Given the above, this make little sense to me:
I have found that not all fx effects work when attached in MDCx even though they appear that they will.
However, I have found that not all developers are ready to accept advice, even though they appear that they will.