Tutorials on making OOT vocal synths?

[Ampless]

Does anyone have advice and tips on making vocal synths like the ones heard in the creation story cutscene from ocarina of time? Or better yet does anyone know what made it back then? Is there something that's close to it that can recreate it?

Link below, thanks for the help!

https://www.youtube.com/watch?v=r4tHItL1xLs&ab_channel=ZeldapediaVideo