Talk:VOCALOID4/@comment-26116982-20150410213445/@comment-1883721-20150419183720

"The last one is not a Vocaloid. Is a human voice with synthetic growl added. Other two are still unclear." -Fingersoop

The last one is in fact, for sure, a VOCALOID. It was originally presented as a demonstration of Growl-Type Properties via. Spectral Morphing- paper here - which the full audio demonstrations can be heard here. Notably, "Unchain My Heart" has two samples using Diphonic Concatenative Synthesis, and one sample using an actual human vocal, which they lifted the growl sample from.

"Diphonic Concatenative Synthesis" is the type of vocal synthesis VOCALOID uses- it's noted in the paper that the development of Growl was for the purposes of use in an already-existing vocal synthesiser, and the research was funded by YAMAHA.

Notably, the synthesized vocal for "Unchain My Heart" is similar in tone to the first two samples in the Clyp sample, so it's within reason to say that all three samples are, in fact, VOCALOID.