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This is an article about the KAITO V3 software for the VOCALOID3 engine.


It is unknown when production switched from VOCALOID2 to VOCALOID3, however, it should be noted that even Crypton Future Media themselves did not know if this update would be for VOCALOID2 or VOCALOID3. Use of the VOCALOID2 version can be found in Project mirai


In October 2010 it was noted that CFM were considering updating Meiko and Kaito to VOCALOID2 or VOCALOID3.[1]

Crypton announced in December 2010 that they were updating their old VOCALOID vocals. However, it was unknown if MEIKO and KAITO would be VOCALOID2 or VOCALOID3 as they were still in the planning stages.[2]

Recording of Naoto Fuuga's voice started on December 10, 2010, beginning with test recordings.[3][4] Several voicebanks of different expressions like the Appends were produced for the product.[5]

On the 10th of December, tests were done on KAITO's voice.[6] Wat confirmed they were discussing the marketing of the KAITO product.[7] The project development was also confirmed in December to be MEIKO > Megurine Luka >> KAITO.[8]

Testing was being carried out on a variety of tones such as a "Power" append that came from deep within the stomach.[9] On the 17th December 2010, 4 appends were mentioned:[10][11]

  • "Mellow"[12]
  • "Serious"[13]
  • "Sweet"[14] - this was abandoned for the "Solid" Append.
  • "Solid"[15]

Wat mentioned he would be asking for the thoughts of female producers on KAITO.[16]

During the thoughts behind the update, it was noted that the differences between Miku and KAITO's low voice were ridiculously large and this was also reflected on the engine itself, leaving Wat wondering if they were still compatible.[17] There was also the question of how to handle the male vocal, speculating if the "voice of the character" could be hung onto with a voice such as his.[18] Wat discussed the problems with KAITO's voice that he had been presented with, stating since KAITO's vocal was a nice all-round voice, getting to act out the "expression of colour" previously seen in the Appends was challenging, as he felt the voice was already beautiful enough.[19]

On the 25th of December, Wat announced that he had been charged with the sharing of information on Kaito on twitter.[20] One of the concerns at the time of development was that KAITO's vocals they were working on were failing to meet quality expectations of consumers; more work was needed.[21]

V3 KAITO: 2011Edit

The first commercial usage of KAITO's Append was by yanagi and kaoling on the album "VOCALOID Minzoku Chou Kyokushuu (VOCALOID民族調曲集)", where he sings the song "Sennen no Dokusou Ka (kaoling mix)".[22] The VOCALO APPEND album later used beta voicebanks of KAITO's "Normal", "Soft", and "Whisper" voicebanks singing "Lost Destination" with Kagamine Len Append.[23]

In January, CFM noted that the silhouette has a transparent muffler. On February 17, 2011, Crypton released a temporary silhouette of KAITO's Append. They said that it has not been decided whether he will have a transparent muffler since there was previous outcry from fans.[24][25][26]

In March, Wat mentioned work on KAITO's vocal had encountered a problem which halted progress. He did not know the release date yet.[27]

In April, work on KAITO's voice resumed.[28] Work on the vocal along with other projects had come to a halt.[29] Wat mentioned wanting to do a vocal with a soft tone as well as a down toned voice.[30] The voice of KAITO was going through checks on the α stage.[31] On the 13th April, 2011, it was confirmed 6 vocal expressions had been recorded, two of which were dropped and the remaining were being brought forward. One had reached completed alpha stage already. The Character Vocal (Hatsune Miku, Kagamine Rin/Len and Megurine Luka) series Appends had been created from vocal performance by their voice providers. The new KAITO Appends were created by adding echo, force and tension to the samples.[32]

Crypton Future media also noted that several voicebanks had been recorded with new high tech microphones through a series of trial and error instead of the standard U87ai, these were:[33]

  • "Vivid"
  • "Solid"
  • "Power" [34]

These vocals were done as a series of experiments with new equipment using Naoto Fūga's voice.[35]

On the 11th of May 2011, Crypton went back to Yamaha to announce the current KAITO development, whose demos were at the time suspended. Crypton apologized for the slow development to their fanbase and enhancements to KAITO's Whisper Append were being made.[36]

On the 28th of May 2011, demos of KAITO's Append "Whisper" and "Power", along with Miku's English voicebank, were posted on Nico Nico Douga.

On the 3rd of June 2011 the demo からくり時計と恋の話 was released using an alpha version of KAITO's "Soft" Append.[37]

KAITO's "Soft" Append was considered by Crypton as KAITO's most natural vocal and was described as requiring little editing to sound good.[38] "Soft" had also left α and entered β now.[39] It was confirmed by Wat that release would be unknown for sometime, but would continue to give out information as soon as possible on the developments of the software.[40] Wat noted during development that "soft" was being adjusted in relation to "whisper".[41] "Whisper" was also still being adjusted, as well as other data which needed to be adjusted in a hurry.[42][43] According to Crypton, lowering the gender factor on KAITO's "Soft" Append renders it sounding like a female vocalist. Although it was cute, it was considered a blunder on their part. So they tried to remove as much as they could.[44]

By 11 June, Wat tweeted they were in the middle of the KAITO recordings and working hard for the first time in years to get the vocals completed.[45] Wat noted they were trying to finish the main voice of KAITO to give them extra time to work on "Whisper".[46] Later it was confirmed that by the end of the month, "Whisper" would be at the same stage as "Soft".[47] Later they announced that the data had been settled on "whisperβ".[48]

Wat reported that KAITO's "Whisper" vocal would have a demo due soon.[49] Wat also referred to the process on KAITO English as "annoying".[50] Also, in July, in relation to the introduction of Hatsune Miku in America, Wat noted that there was a high level of female Vocaloid fans in America compared to Japan. Based on this, Wat planned to test the demand on KAITO to see what the reaction was.[51] Crypton also finished recording KAITO's vocals after work was previously suspended for an interval.[52] Crypton was in discussion with Fuuga, KAITO's provider on the image and vocal outputs.[53] A classic KAITO Vocaloid style recording had also been completed, one which will sound close to the vocal tone of the original voicebank that users were familiar with.[54] It was then reported that there will be some wait for more information.[55]

On October 14, 2011, Crypton updated via their twitter, stating that English KAITO will take some time to produce.[56] Not long after, it was announced via Piapro[57] and Miku's FB that a surprise concerning KAITO will be revealed at the 2011 New York Anime Festival. When October 16, 2011 came, the panel revealed a demo of KAITO's English VB. Footage of the demo was captured and uploaded onto YouTube:


KAITO singing "Top of the World" by the Carpenters (Straight) YouTube

It was later tweeted that KAITO's English voicebank was in its alpha stage, and that it still needed brushing up on.[58] Checks were also done on the English vocal in December.[59] KAITO's lower tones also had to be fixed.[60]

Wat tweeted on the 1st December 2011, noting that all previous demos had originally been rendered with the VOCALOID2 engine, and things were being redone for the VOCALOID3 engine.[61]

Crypton also ran a contest involving Kagamine Len Append, where the winner received exclusive information on KAITO's update.[62]

V3 KAITO: 2012Edit

In February Wat discussed the differences between the CV series (Hatsune Miku, Kagamine Rin/Len and Megurine Luka) and KAITO/MEIKO. He stated that their appends were being adjusted using editing techniques to achieve the results, whereas the CV series Appends had been done by acting performance.[63] English KAITO's voicebank was reported to have received adjustments to a few of its diaphonetic data in February 2012.[64]

Crypton Future Media began looking for Japanese producers who can use English capable VOCALOIDs to work with for the English version.[65] KAITO himself is currently being compared to overseas male English VOCALOIDs.[66] On 23 February it was announced that they were able to talk about the progress of both Japanese and English KAITO voicebanks in production.[67] The company is exchanging VSQ files with producers to see how the current English VOCALOIDs compare with KAITO.[68] Several overseas producers were now taking part with KAITO's production.[69] KAITO's double vowel and vowel to vowel sounds had been adjusted after a report came back on their flaws.[70]

It is confirmed that KAITO's clothes would not change in March 2012, they will just get a facelift.[71] The boxart will also use a 2.5D style drawing. In early March 2012, Kenmochi Hideki was given the voicebank to make further adjustments.[72] The English vocal was sent to Kenmochi Hideki to check the vocals. Crypton noted that all that was left was for KAITO's vowels to be adjusted.[73]

In April, Crypton commented on "Whisper"'s use of triphones as "wonderful".[74] KAITO's "Normal" voicebank was also officially declared as part of the new version.[75] Wat also confirmed the manual will contain a history of VOCALOID KAITO.[76]

In May, KAITO's voice was still being adjusted.[77]

Checks were run on KAITO's voice in October.[78] Further adjustments were made to KAITO and Miku in early October prior to their vocals demostration.[79] Crypton were also considering what to call the default vocal for KAITO, they had suggested names like "Neutral", "Natural" and "Default".[80]

An English demo of Miku and KAITO was shown NYCCon 2012, both were still in their beta stages. KAITO's V3 "Whisper" and V3 vocal were shown.[81] KAITO's English vocal release was expected to be "by the end of this year or the beginning of the next".[82]

In December it was reported that news on the update of KAITO is due within the next few days.

According to Crypton Future Media, there had been some delay on KAITO's V3 version due to their desire to include "Piapro Studio" with his package.

V3 KAITO: 2013Edit

He was set for a February 2013 release.

In early January 2013, adjustments to KAITO's voicebanks were completed and KAITO was set to be released mid-February 2013 as scheduled.[83] DTM Magazine is due to run a series of tutorials on how to use KAITO V3 for beginners.[84] The idea of the bundles being offered with KAITO V3 software is to give users everything they need in basic sound making.[85] The reason why KAITO has 4 vocal libraries is to minimize the amount of troubles they would encounter with the pack.[86] A special discount was offered to VOCALOID1 KAITO users, the price based on the difference between VOCALOID1 KAITO and the CV series price.[87]

KAITO V3 was released on February 15, 2013.[88]

Mac UpdateEdit

In late 2013 it was announced that Kaito would have a Mac release for the VOCALOID NEO engine. This version will be released for free with purchases of the Windows Kaito V3 product version. It was later announced that Kaito V3 Mac will be released on the 15th of February 2014.


Future PlansEdit

In 2014 Wat mentioned playing with the wavelengths of experimental Vocals he hoped to one day release. These 3 vocals he mentioned were Kaito "Light", Miku falsetto and Meiko "Hard".[90]

Product InformationEdit



黄金木の葉が舞う頃に (Ougon Konoha Ga Mau Koro Ni) (Straight) Niconico YouTube Crypton
からくり時計と恋の話 (Karakuridokei to Koi no Hanashi) (Soft) Niconico YouTube Crypton
からくり時計と恋の話 (Karakuridokei to Koi no Hanashi) (Whisper) Niconico YouTube Crypton
CiRCuS MoNSTeR (English) Niconico YouTube Crypton
月雪花 (Tsuki-Yuki-Hana) (Straight) Niconico YouTube Crypton
夢懸歌 (Yumekake Uta) (Whisper, Straight) Niconico YouTube Crypton
水の道化師 (Mizu no Doukeshi) (Soft) YouTube Crypton
Rose + Thorn (English) Niconico YouTube Crypton
玄冬桜 (Gentouzakura) (Whisper) YouTube Crypton
悪徳のジャッジメント (Akutoku no Judgment) (Straight) YouTube Crypton
Sweet's Beast (Soft) YouTube Crypton
crystal mic (English) YouTube Crypton
逆罪行進曲 (Gyakuzai Koushinkyoku) (Whisper) YouTube Crypton
時計塔のうた (Tokeitou no Uta) (Straight) YouTube Crypton
カンタレラ (Cantarella) (Short ver.) (Soft feat. Hatsune Miku) YouTube Crypton
YES YES (English) YouTube Crypton
海渡る風の唄 (Umi Wataru Kaze no Uta) (Straight, Whisper, Soft) YouTube Crypton
戦唄 (Ikusa Uta) (Straight) YouTube Crypton
島唄 (Shima Uta) (Straight, English) Niconico YouTube Crypton
万感吟遊 (Bankan Ginyuu) (Straight) YouTube Crypton
恋するアプリ (Koisuru Apuri) (Soft) YouTube Crypton
Pane dhiria (Straight) YouTube Crypton
Anonymous (English) Niconico YouTube Crypton
モーニングコール (Morning Call) (Whisper) YouTube Crypton
Chillyditty Of February (Straight, Soft) YouTube Crypton
時忘人 (Tokiwasurebito) (Straight) YouTube Crypton
Mirror Rule (Soft) YouTube Crypton

Demo page


  • Windows XP (32bit) / VISTA (32bit) / 7 (32, 64bit) ※ Windows 8 in (64bit) 32bit compatibility mode (WOW64): OS
  • Recommended Intel Core 2 Duo 1.8 GHz or more: CPU
  • Recommended 2GB or more: RAM memory
  • Free space of 25GB or more
  • Other: Display / Internet connection environment of video card / 1280x768px or more corresponding to the driver of the DVD-ROM drive / sound device / OpenGL 3.0 or more (when activated)

Voicebank LibrariesEdit

KAITO V3 also includes Piapro Studio.[91]

Product Information
Package details
This was the replacement/upgraded package designed to replace the VOCALOID KAITO vocal package. You do not need the previous VOCALOID version to use this pack like the appends for the CV series, . The need for an update was because the results would not satisfy the demand of the VOCALOID users and fans.[92]

Its counterpart is the MEIKO V3 product.

Vocal traits as noted:
  • This product has been stated several times to be a far different extension to the Character Vocal's Appends. The tones within these voicebanks are more natural sounding tones rather than expressive tones.
  • The vocals are also complete new recordings using none of the past VOCALOID data.[93][94]
  • When imported into VOCALOID4, the cross-synthesis (XSY) function can be used on all 3 Japanese Kaito voicebanks.
    • In total the package offers the equivalent of 6 additional voicebanks achievable via XSY. The total tone variation offered by the package comes to a theoretical 9 voicebanks in total.
    • Note that these vocals were not designed to be used for XSY originally as it was not part of the VOCALOID3 engine functions. Results may be rougher than VOCALOID4 XSY vocals for that reason.
Software issues as noted:
  • This originally was intended to be a VOCALOID2 release.
  • Despite the inclusion of English, there is no technical support for the English Vocal offered. The other Append voicebanks do not support English as well.

Individual vocalsEdit

Product Information
  Genre: Folk, Pop, Rock  Tempo: 90 ~ 200BPM  Range: B1 ~ C3
Package details
DB 1 STRAIGHT is designed to hold the same tone as the original VOCALOID1 vocal.
Vocal traits as noted:
  • In comparison to the past VOCALOID1 vocal, it is much higher quality to match the VOCALOID3 standards.
  • The results are much cleaner than the original VOCALOID1 vocal but maintain the VOCALOID3 vocals ability to act as an all-round voice.
  • Out of all 4 vocals, Straight can best handle the fastest tempo.
  • the Straight vocal has a small optimum vocal range compared to some of the other VOCALOID3 vocals
  • At 90 tempo, Straight has the highest of the minimum optimum tempo range for any of the 4 vocals and is less adapt for slower songs than they are.
Software issues as noted:
  • With the use of newly recorded data comes a price; KAITO V3 does not produce the exact same results as VOCALOID1 KAITO
  • During the demo releases, one producer commented that "Straight" was 'nasty' to edit.[95]
Voicebank sample

KAITO V3 Straight

Kaito straight by Rinshuu

Product Information
  Genre: Soft Rock, Folk, Ambient  Tempo: 80 ~ 180BPM  Range: D2 ~ B2
Package details
DB 2 SOFT voice is designed to give a softer tone to lyrics.
Vocal traits as noted:
  • This vocal was considered KAITO's most natural sounding during development according to Crypton Future Media themselves.
  • During his demos, one producer commented that Soft was easy to edit.[96]
  • It shares a smaller vocal range then either "Straight" or "English".
Software issues as noted:
  • Crypton Future Media reported during development that this vocal loses masculinity quite easily when adjusting the GEN factor, rendering the vocal sounding more like a female vocalist than a male.
Voicebank sample


Kaito soft by Rinshuu

Product Information
  Genre: Ballads, Jazz, Soul  Tempo: 65 ~ 150BPM  Range: F2 ~ D3
Package details
DB 3 WHISPER is a gentle and soft "whispery" vocal which is intended for calmer songs.
Vocal traits as noted:
  • It has the capability to go a little higher on notes than the other voicebanks within this package naturally.
  • As its optimum range allows it to go down to a tempo of 60, it is more adapt at slower songs then the other vocals within this back.
  • Like "Soft" its optimum range is smaller than "Straight" or "English".
  • Whisper itself has the smallest optimum tempo range out of the KAITO vocals within this package.
Phonetic notes as noted:
  • Crypton themselves commented that Whispers use of VOCALOID3 triphones were "wonderful", indicating they are good in this particular vocal.
Voicebank sample

KAITO V3 Whisper

Kaito whisper by Rinshuu

Product Information
  Genre: Crossover, Dance, Electronica  Tempo: 70 ~ 190BPM  Range: B1 ~ B2
Package details
DB 4 ENGLISH, gives English capabilities to the V3 package and allows users to create better English results than using any of KAITO's Japanese voicebanks for the same purpose.
Vocal traits as noted:
  • Like "Straight" this is an all-round voice, intended to have a natural tone of voice and maintains a natural singing voice.
  • It has the largest tempo range capabilities of all the KAITO vocals within the KAITO V3 package.
  • Like all other Vocals within the package, the English vocal has a small optimum vocal range compared to some of the other vocals within the VOCALOID3 range. It current ties with Hatsune Miku V3 English as the 2nd smallest tempo range of any VOCALOID3 vocal.
  • Wat mentioned during development that there were many annoyances encountered with this vocal, though excluded to mention what they were.
Phonetic notes as noted:
  • Has issues in pronunciation due to his Japanese accent. For example, when the [u:] phoneme comes after the [l0] phoneme (Clear L), this one will sound out as the [r] phoneme. So typing [r u:] and [l u:] into his English voicebank will sound exactly the same. One way to fix this is to use [l w u:], though the [u:] will sound distorted.
Software issues as noted:
  • Despite "Straight" being its closest Japanese vocal, there is a difference between range and tempo that may render imperfect transitions while switching vocals.
Voicebank sample

KAITO V3 English

Kaito english by Rinshuu


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  24. tweet 10:44 PM - 8 Jan 11
  25. [1] Piapro Blog - 【プレゼント企画】2月17日でKAITOは発売5周年!ということで、お祝い企画開催決定!! (KAITO's fifth Anniversary - 「KAITO Append(仮)」)
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  37. [2] Vocaloidism - Kaito Append Alpha Demo: Soft
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