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Kagamine Rin & Len VOCALOID2 act2 Append VOCALOID4 English | Piapro Studio | Songs Albums Notable Originals

This article is about the VOCALOID2 software known as voicebanks, dubbed act2. If you are looking for the VOCALOID characters then click here.


On June 12, 2008, Crypton announced that an updated edition, named "act2", would be released in early July 2008. Crypton Future Media apologized for the bad quality of the original Kagamine Rin/Len product. They explained that they had rushed the Kagamine product onto the market in the wake of Hatsune Miku's success and promised to produce a better quality version to correct their mistakes. The product itself had been in production between April and September 2007 and had not been changed between then and their release. The following April they continued to work on the vocals from where they were left off to tweak the issues surrounding them. Crypton Future Media also promised to speak more closely with the fans, and keep them up to date more on their VOCALOID software progress.[1]

The new version was released to address issues with the original voicebanks that affected their ability to sing clearly. The database was reshuffled to allow the voicebank libraries to handle the samples better, and Crypton Future Media worked heavily to improve the vocals. act2 was as an independent installation, coexisting with the initial software.[2] During act2 production, Crypton Future Media also took the time to change the End User agreement on their CV series to make it easier to understand.[3]

Users who had bought the old version got an expansion disc free of charge, an offer which continued until 20 September 2008, after which users could no longer register.[4][5] On June 18, 2008, beta demonstration songs using the new version were released on the company's official blog; and on July 18, the act2 was released. The original version of the software is now retired from sale by Crypton Future Media themselves.[6][7][8]

Final Retirement[]

At the end of 2015, it was announced that from March 31, 2016, VOCALOID2 was being retired and no new serial codes were be issued by Yamaha.[9]

Product Information[]



L-Side and R-Side act2 demos Crypton
act2 demos Crypton
Action (Kagamine Rin/Len - act2) YouTube Crypton
夏の海 (Kagamine Rin/Len - act2) YouTube Crypton

System Requirements[]

  • 2000 + or more computer Pentium4 2 GHz / Athlon XP
    • (Recommended 64 2800 + or more Pentium4 2.8 GHz / Athlon)
  • OS Windows XP (32bit) / VISTA (32bit) / 7 (32, 64bit)
    • Operation 32bit compatibility mode (WOW64) in 7 (64bit)
  • RAM memory 512MB or more
    • Recommended 1GB or more
    • Real-time VSTi is recommended when using more than 2GB
  • Interface VST2.3 (32bit) / ReWire / stand-alone


"Kagamine Rin" is once again the default vocal and Kagamine Len must be manually selected.

Product Information
  Trial/Demo Vers?: No
Package details as noted:

Act2 was released as a general fix to the previous Kagamine package.[10][11] While it has the same direction as the original vocal release, the database within had been reorganized and adjustments made to fix vocal problems.

Act 2 is a separate installation to the previous release and therefore the original Kagamine package is not needed for use.

Vocal traits as noted:
  • Produces slightly different sounding results compared to the original Kagamine package.
  • Both vocals were intended to be clearer.
  • The vocals were more comprehensible by native Japanese speakers.
Software issues as noted:
  • Changes in the vocals improved singing results, but both Kagamine vocals lost flexibility in the process. This means while they can produce better tones, they cannot produce as many tone varieties as they did before.
  • The "/h" phonetic data is missing from both vocals in this version.
  • While clarity is noted there have been reports of issues with note transitions resulting in muffled pronunciations.

Individual vocals[]

Product Information
  Genre: Electro-pop, Enka, Pop, Rock  Optimum Range: F#3 ~ C#5  Optimum Tempo: 85 ~ 175 BPM
  Total Tempo (min-max): 90 BPM  No. of Keys: W ~ 11, B ~ 9, Total ~ 20
Package details as noted:

Kagamine Rin Act2 is an improved version of the original Kagamine Rin vocal. This vocal is a deep sounding teenage female and the counterpart to the Kagamine Len vocal.

Vocal traits as noted:
  • The improved vocals in Act 2 make this vocal clearer than the original Kagamine Rin vocal, but lost impact.
  • Is more suitable for less experienced users. However, tricks and adjustments to further improve vocal the may not longer work for advanced users.
  • Loss of flexibility in the vocal compared to the original, meaning Rin may not be suitable for songs she could previously handle.
  • Her voicebank sounds choppier in comparison to the original.[12][13]
Phonetic notes as noted:
  • Her vowel connections are more noticeable than the original ACT1 voicebank.
Voicebank sample

Kagamine Rin ACT2

Product Information
  Genre: Dance, Enka, Pop, Rock  Optimum Range: D3 ~ C#5  Optimum Tempo: 70 ~ 160 BPM
  Total Tempo (min-max): 90 BPM  No. of Keys: W ~ 14, B ~ 9, Total ~ 23
Package details as noted:

Kagamine Len Act2 is an improved version of the Kagamine Len vocal. He is intended to be a deep sounding male and Rin's counterpart.

Vocal traits as noted:
  • Is clearer and easier to use.
  • Less vivid and flexible and does not allow delicate settings or editing which gives a wider range of expression to experienced users.
  • Change of tone resulted in some songs once suitable for his voice no longer being suitable.
  • Has the most improvements and changes within the package.
Phonetic notes as noted:
  • Some vowel connections have been improved.
Software issues as noted:
  • A notable change of tone made this vocal sound more different to the original Kagamine Len vocal.
  • His transition between notes are noticeably less powerful and muffled.
Voicebank sample

Kagamine Len ACT2


  1. link
  2. proof
  3. link
  4. link
  5. link
  6. [1] Crypton Rin/Len Kagamine act2
  7. [2] Richier - Hatsune Miku Note May 29, 2008
  8. [3] Nico Nico Gosanke Wiki: Rin Kagamine
  9. link
  10. [4] DTM Magazine - CV02 鏡音リン・レンACT2 (CV02 Kagamine Rin/Len ACT2)
  11. [5] Amazon/jp - Rin/Len Kagamine
  12. VOCALOIDOtaku - How much did they actually "improve" ACT2?
  13. VOCALOIDOtaku - Japanese VOCALOIDs Comparative Charts and Tips