Forgive me bumping an older topic – but hopefully what I have to say justifies it! If the Forum Gods should see fit to smite me for it, I accept my fate.
WELL… knowing MOTHER fans, it’s never out of the question that someone might’ve coded an entire VST dedicated to MOTHER sound sampling. But I don’t know of one. So barring that, probably your best bet would be some intensive sampling. Naturally this won’t get you what you’re hoping for (And believe me, when I read this topic heading I was like I MUST GET THIS) but I think you could get partway there by using one of the many EB soundpacks that are available online.
That, or else maybe a SNES soundchip VST! With enough ingenuity, you could reverse-engineer the patches yourself. Sounds like a lot of work though. I’d be very curious to see what other MOTHER fan musicians use to make the fangame music you mentioned. Whatever it is, it sounds like they’re doing it right!
Just some musings from a fellow software-oriented musician :>
EDIT: OKAY I AM WRONG. It turns out the SNES doesn’t work that way. The SNES, I guess, does not have its own sound generating chip, but rather is itself a complicated sampler? I am new to this, my bad. In other words your options are: Samples, Samples, Samples; or Get Really Good At Engineering SNES-like Patches With Other Synthesizers.