Hatsune Miku VOCALOID2 Append English VOCALOID3 Light Vivid eVocaloid VOCALOID4 V4 English V4 Chinese

This is an article about the Hatsune Miku English software for the VOCALOID4 engine.


Most of the development was done in the process of steps that consisted of Saki Fujita being recorded, the sound being checked, and if needed re-recorded. The vocal required a lot of retakes but was a marked development status in Crypton Future Media English development. Yuu Asakawa was brought in to aid with the recording.

A lot of the issues stemmed from Saki not being bilingual nor a native English speaker and was still learning English at time of the production. She was aided by Yuu who was not a native vocalist herself, nor considered herself as bilingual. Yuu sat next to Saki throughout the recordings and tried to teach Saki English. She spoke about how easy it was to record a native Japanese voicebank, but to make one that was not her own would always be difficult for her, particularly as she had no idea herself how to pronounce English words or to imagine how to pronounce it. Thus, she thought teaching English would be better. She mentioned that Saki had many thoughts and feelings of frustration with English and Yuu tried to not think about those while teaching. Teaching Saki English was the same as general voice training (voice acting lessons).

Teaching Saki to be better at English would also teach "Hatsune Miku" to be better at English. Part of the support Yuu offered was trying to keep Saki positive and happy while recording the English vocal. She believed it was more important to teach how to speak English itself rather then getting the English pronunciation correct. Pronunciation, in her opinion, was like gym class and would repair exercise and experience to do so, and likewise, it cannot be mastered in a short time. Due to the pressure of those who can speak English well even in Japan, there was a lot of pressure on Saki. Yuu thought that teaching Saki English in the recording studio would be a happy and new experience, but noted she couldn't overdo things. The support included dealing with a personnel matters and when there had been cases where Saki had been offered bad advice, the consequences were a terrible bad recording session.

Yuu commented that Saki was very professional and did a good job despite the difficulties and issues recording them. She noted that the experience was a positive one for both. The final recording was very good and the results were much better.[1]


On August 24, 2014, Hatsune Miku was confirmed to have another English database in production. Whether or not this was an update of Hatsune Miku V3 English or an English Append was unknown at the time.[2]


On June 26, 2016, more details regarding Miku V4 English were announced via Wat's Twitter. He said that various aspects of Miku's V4 English voicebank were undergoing adjustments and being checked over.[3] The tone of her V4 English voicebank would be aimed to sound similar to ORIGINAL ~ VIVID. The voicebank's bias of pronunciation depended, though it would have a bright/clear feeling.[4]

Product InformationEdit



Sharing The World YouTube
Our Broken Anthem Niconico YouTube
Melody Niconico YouTube


  • OS:
    • Windows: Windows 7 (32 / 64Bit), Windows 8 (32 / 64Bit), Windows 10 (32 / 64Bit)
    • Mac: OS X 10.8, 10.9, 10.10, 10.11
  • CPU: Intel Core 2 Duo 2 GHz or more
  • RAM memory: 2GB or more (or more recommended 4GB)
  • HDD:
    • Windows: 14GB or more of free space (NTFS format)
    • Mac: 14GB or more of free space (HFS + format)
  • Installation Media:
    • Windows: DVD-ROM (1 sheet)
    • Mac: Download file
  • Other: DVD-ROM drive, sound device, OpenGL 3.0 graphics board, screen resolution greater than or equal to 1280x768px, internet connection

Voicebank LibrariesEdit

Product Information
  Genre: Pop, Ballad, Jazz  Optimum Tempo: 80 ~ 135PM  Optimum Range: B2 ~ C#4
  Total Tempo (min-max): 55BPM  No. of Keys: W=9, B=6, Total=15
  Trial/Demo Vers?: Yes  Starter Available?: No
Package details
This is the English version of the Hatsune Miku V4 software and an update of her previous V3 English voicebank. According to Wat, her English is cute.[5]

This vocal package comes with Piapro Studio included.

Vocal traits as noted:
  • GWL added.
  • Has a larger tempo range, allowing both more faster and slower genres of music.
  • Has a larger vocal range then the previous version.
  • Her cuteness is particular in the higher ranges.[6]
  • Increased clearness then her previous version.
  • This voice sounds closer to the original Miku then the V3 English release.
  • Due to sharing the same tempo and vocal range, it is suitable to use with the later Hatsune Miku V4 Chinese vocal within the same song, though tone matching issues may occur.
Cross-Synthesis notes:

This vocal is able to use XSY. Note this is a standalone vocal with no additional voicebanks released to accomply it. Users wishing to use Miku for XSY in her English version must acquire another voicebank from the "Hatsune Miku V4 English" XSY group.

  • From Ver.4.3.0 of the Vocaloid engine, a XSY group "Miku V4 English" was added to Vocaloid. All vocals within the "Miku V4 English" group can XSY with each other. This vocal release is part of this group. If the User owns another vocal from the "Miku V4 English" group, XSY between the vocals can occur.
  • In total the package offers the equivalent of 2 additional voicebanks achievable via XSY. The total tone variation offered by the package comes to a theoretical 4 voicebanks in total.
  • Note that also "GWL" does not become viable for use with a V3 vocal used as the primarily vocal. Users need to take this in mind when using the Hatsune Miku V3 English vocal for this role.
  • XSY is only possible with the full VOCALOID4 software.
  • Compared to the Megurine Luka V4x English XSY group, this has more contrast between the vocals held within the group. Therefore there is a better impact on XSY within this English group then the Megurine Luka English group.

Phonetic notes as noted:
  • Most of her mispronounced phonetics were fixed and improved. However, the voicebank still has pronunciation issues in certain consonants, specially the [r], [l] and [l0] phonetics and the overall vocal performance maintains a notorious Japanese accent.
  • According to some users, her phonetics sound clear only when working inside the optimum vocal range; in higher notes, they crisp and shrill, while lower notes sound mumbled. Extra edition has to be done to avoid this.
  • The vocal is an overall improvement on the VOCALOID3 vocal with both better pronunciations and more natural sounding tones. Focus was on teaching Saki how to English better instead of being exactly precise while still maintaining the voice of "Hatsune Miku". The result is the vocal put less emphasis on being precise in English sounds themselves but sounded more natural which had the consequences of leading to more accurate sounds overall.
Software issues as noted:
  • According to producer Cillia, using the voicebank was a "challenging experience". She also mentioned that the voicebank quality and clarity is heavily affected when any kind of effects or filters are applied, making it not suitable for particular ways of mixing.[7]
  • Although this vocal was created with a sound closer to the original Japanese voicebank, there's still a timbre contrast between both libraries and switching languages during a song will be notorious.
  • Along with her English V3, she maintains one the shortest tempo ranges of any previous English vocaloids by Crypton Future Media (and English vocaloids in general).
Voicebank sample

Hatsune Miku V4 English

Miku eng


  2. Demo and announcement in description
  5. link
  6. link
  7. link