Rule: Credit base voicebank

If a voicebank is only credited by the character name, and you can’t be sure which version it is used, credit the base voicebank or the umbrella “(Unknown)” voicebank. For example:

• “Hatsune Miku”: Hatsune Miku
• “Otomachi Una”: Otomachi Una (Unknown)

There are some exceptions where the base voicebank should be avoided. For example, Japanese “Xin Hua” songs should be credited with the V4 Japanese voicebank, since the base voicebank is Chinese.

• “Xin Hua”: “Xin Hua V4 Japanese (Unknown)”

The “unspecified voicebank” tag can be added to indicate that the credited voicebank is not specified.

Note that the usage of the voicebank could have some clues:

• Not all voicebanks support all languages. As demonstrated with the “Xin Hua” example, the base voicebank is Chinese, but Japanese songs should use the appropriate base voicebank.
• Check when the song was produced and compare it with the voicebank release date. For example, a Kagamine Len song released before 2010 (release of the next year) can be safely credited to the V2 version.