Done!
It was that I don't use any user.script.txt. I needed to remove that extraneous bit from the bat script.
Thank you, Steph.
Though I haven't experimented enough to know if I can achieve my subsonic thud sounds, I have already been able to tweak up my cannon sounds to impressive standards, and also now have the tools to add new sounds, voices or otherwise, if should I choose to.
Thanks again.