If you have a finished song you might be best just to drag n drop into Synth V.
I tried the vst3 but it was a bit sluggish in Biab.
I haven't got into it enough to give it a good try out, I tried it with a vocal line out of some kar files and was impressed how it sounded without tweaking anything else.
vocal-test.svp

https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=742590

I remember back in the 80's my brother had a Hitachi Peach computer and he go a voice synthesizer card for it.

Dave should be able to use it with the Lua scripting.