I've been looking to the Vocaloid synthesizers and they are impressive, if one compere them to what a singing synthesizers were able to do a decade ago.
English:
Spanish: https://www.youtube.com/watch?v=
Japanese: https://www.youtube.com/watch?v=
At this point I'm not quite sure if when they refer to Vocaloid, they are talking about the singing synthesizers, or rather is a new genre of music sung by a real person, I'm a bit confused now.