Board Thread:Poll Archive/@comment-30602727-20150315183401/@comment-53539-20150316075736

@Evil; triphones can be gathered from old recordings, as was noted with Megpoid V3. Least this is true for Japanese, other languages I can't say. But Yuki is Japanese so thats all there is to it.

Quite literally growl is the only feature they can't get from old recordings, because its a new sound entirely and wasn't part of the language.