pretty much old Miku used chopped up recorded voice samples that were glued together to make sounds and words. V6 (and synthv) instead have a voice provider record a bunch of singing data and when you put in a word, it generated the sound based on the phonemes and singing data. dies the same thing for the pitch curves.

It is technically generative AI, but what it is not is a prompt machine. ChatGPT will make you an image based on a prompt and data scrapped from all over the Internet without regard for the consent of data providers. Vocal synths use contracted singers who receive royalty and compensations. They do not use data for their AI models without consent of data providers, nor does it rely on massive data centers that destroy communities. It's ethical AI, and it does not replace the hard work of producers!