Talk:YOHIOloid/@comment-66.233.47.74-20130521010425/@comment-53539-20130521172114

The bored sound comes from their recorded in monotone... They can't change their vocal tone and it often comes across like this.

It seems to be more common for the professional singers then vocal performers, I think it has something to do with control over their voices. The performers don't have that control so there may be more differences per sample, which creates less monotone. Makes the vocal less stable though...

There is so many factors in play though I'd not pin it just on this one possible thing though. When you consider that Gakupo or the VY series can sound bored, it certainly seems to be something along the lines.