Talk:Synthesizer V/@comment-25224941-20181007233231/@comment-53539-20181008100441

Likely test/demo vocals they haven't finalised into finished versions.

Even in Vocaloid vocals have this habit of being codes. "CV01" was the code for Miku though in this case they continued to use it after she was complete. "Yuma" was VY2's codename (VYs do things the other way around). Kaito was "Taro". Even Voiceroids have been known to be coded (someone found a page dedicated to Voiceroid wherein they demonstrated upcoming voices, they were written as something like "Female 1").

So thats all those are, codenames for upcoming vocals or test vocals they have no intention of releasing.