Vocaloid Wiki

UNI VOCALOID4 Append English | Songs Albums Notable Originals

This article is about the VOCALOID4 software known as a voicebank. If you are looking for the VOCALOID character then click here.



UNI was announced on the VOCALOID EMPIRE fan-cafe on November 9, 2014. The announcement stated that YAMAHA portrayed a positive position on UNI's development, which would commence so long as there are no "huge unforeseen consequences", and that SBS A&T was to provide assistance for UNI's voicebank development. Demo songs for UNI would be selected from the most popular original songs uploaded to VOCALOID EMPIRE. The announcement also stated that Korean VOCALOID development "may not end with UNI only".

Dr. Yun, a Korean producer and admin of VOCALOID EMPIRE, revealed in the comment section that ST MEDiA planned to record UNI's voicebank with a professional voice actress who would be chosen before the end of November. He also confirmed that UNI's design concept was finalized and that they were only considering a Korean voicebank for the time being.[1]

On November 29, the staff stated that they were looking for voice provider suggestions. Fans could comment the voice provider they think would suit UNI and the staff would check periodically to see the most recommended choices. They would keep the most popular suggestions in mind.[2]

On December 7, one of UNI's full designs was revealed at the Shanghai Exhibition Center in China.[3] However, if fans did not agree with the design or if the design received backlash, editing or changing the design was in consideration. The design that was revealed was a finalized design, but was not the finished product.[4] It was stated that the design on the banner was also not final. The hairstyle was an important piece of her design and was going to be kept in the final version. In terms of the voice provider, they were looking for someone who would have a calm, warm, and mature-sounding voice. [5]


Around the end of April 2015, fans asked questions about UNI's development to the staff of ST MEDiA. The company answered that they could not reveal whether UNI would be put on the VOCALOID3 or VOCALOID4 engine nor the voice provider at this point in time. They were still hoping for a 2015 release and confirmed that overseas fans would be able to purchase her.[6]

On July 11, when asked about if UNI was on the VOCALOID3 engine, VOCALOID EMPIRE confirmed that UNI was in production for the VOCALOID4 engine since the beginning.[7]

On July 27, several questions were brought up to VOCALOID EMPIRE's twitter account. UNI would have more than one voicebank and it was hinted that she may be able to sing in multiple languages.[8][9] It was also noted that she may not meet the estimated summer 2015 release.[10][11]

Her design was originally intended to be revealed on August 15, but was shown early on August 4 due to the silhouette receiving 300 likes on Facebook.[12] VOCALOID EMPIRE said they wanted to produce banks in Chinese and/or English, but that UNI would most likely be released with 2 voicebanks in total.[13][14][15] However, the certainty of these claims was later thrown into question by a translator. Korean tweets suggested UNI would be released with one voicebank, but more if she was successful.[16] On September 8, it was revealed that UNI would not be released until 2016.[17]


On June 17, 2016, a sample of UNI's voicebank was released and utilized a "Soft version" that was still in development. It was revealed that she would be capable of cross-synthesis and was set for release in September. An English voicebank was slated for 2017. It was also mentioned that her voice provider had changed during production.

On November 16, it was later announced that UNI's Korean voicebank was delayed to January 2017. However, her additional voicebanks, Power and Soft, would be released separate from the original voicebank in Summer 2017.[18]


On January 25, 2017, ST MEDiA acknowledged UNI's delay and said that they were not able to release her in January due to the wait for YAMAHA's final approval. ST MEDiA hoped that UNI would be released by February and that she would not be delayed further. It was also announced that ST MEDiA opened up their own online store: Character Planet. UNI's voicebank would be sold on Character Planet on its own or as a starter pack with the VOCALOID4 editor.[19]

On her official product page, it was noted that UNI's pre-order sale would last from February 2 to February 12. Her release date was set for February 14.[20]

Product Information[]



UNI[21][22][23] YouTube
Boundary YouTube
어제, 오늘, 내일 (Eoje, Oneul, Naeil) YouTube
Installation YouTube
작별 카운트다운 (Jakbyeol Countdown) YouTube
Elixir YouTube
愛情販売機 (Aijou Hanbaiki) YouTube

System Requirements[]

  • OS:
  • Windows: Windows 10, Windows 8.1, Windows 8, Windows 7 (32/64bit)
  • Mac: Mac OS X 10.9, Mac OS X 10.8 (32/64bit)
  • CPU: Intel Dual Core CPU
  • RAM: 2GB or more
  • Hard Disk Capacity: 4GB or more
  • Internet Connection


Product Information
  Optimum Range: A2 ~ F4  Optimum Tempo: 60 ~ 160 BPM
  Total Tempo (min-max): 100 BPM  No. of Keys: W ~ 13, B ~ 10, Total ~ 23
  Trial/Demo Vers?: No  Starter Available?: Yes
Package details as noted:

UNI is a Korean female vocal.

Vocal traits as noted:
  • Her pronunciation is clear, yet maintains a sweet, naive tone.
  • Her voice loses "power" in the higher registers as it is tighter sounding.
  • Her overall voice is considered fairly neutral sounding and as well as cute sounding, it can pass as a mature vocal. This makes it a highly versatile voicebank.
  • It is easy to use because it has a good bass.
  • It has good pitching on single notes thanks to clean consonants.[24]
Phonetic notes as noted:
  • As noted by producer cillia, UNI does not have as many phonetics as SeeU and lacks phonemes [f], [v], and [z]. These, however, are not needed for Korean in the first place.[25]
  • Her ㅅ (s) is extremely weak.
  • If a note set that includes a "-" filler phoneme is too short, she will skip the "-" phoneme entirely. This is an issue she shares with SF-A2 miki and SeeU.
  • Some of her sounds need additional attention, as some of her phonetic samples are too "long" sounding.
Software issues as noted:
  • Slight changes to her vibrato settings may cause her to sound off pitch, which can be fixed by either manually drawing vibrato using the PIT parameter instead of using the regular vibrato system, or using third party software such as Autotune or Melodyne.
  • Some of her vocal transitions are more choppy than SeeU's
Voicebank sample

UNI Vocaloid 4


  1. Questions and Answers (translated by randomkoreantranslations via tumblr)
  2. Suggestions for UNI's voice provider
  3. Full design reveal
  4. http://cafe.naver.com/vocaloidempire/26827
  5. http://www.vocaloidotaku.net/index.php?/topic/56714-new-korean-vocaloid-uni/page__view__findpost__p__1222662
  6. Questions about UNI
  7. UNI V4
  8. https://twitter.com/vocaloidempire/status/625511002914820097
  9. https://twitter.com/vocaloidempire/status/625508731564990464
  10. https://twitter.com/vocaloidempire/status/625508407601184770
  11. https://twitter.com/vocaloidempire/status/625508796216004608
  12. https://www.facebook.com/vocaloidtalks/photos/a.546427865509226.1073741828.542702002548479/546479295504083
  13. https://twitter.com/vocaloidempire/status/628597664448413696
  14. https://twitter.com/vocaloidempire/status/628594195775770624
  15. https://twitter.com/vocaloidempire/status/628595289302167554
  16. http://www.vocaloidotaku.net/index.php?/topic/56714-new-korean-vocaloid-uni/page__view__findpost__p__1284811
  17. http://ask.fm/vocaloidempire/answer/132419726026
  18. http://cafe.naver.com/vocaloidempire/46482
  19. http://cafe.naver.com/vocaloidempire/48079
  20. http://cafe.naver.com/vocaloidempire/48265
  21. https://www.youtube.com/watch?v=Jq2bjZuRUM - Initially, it was thought that UNI's very first demo, titled "UNI", used her "Soft" append, but it was later clarified in September 2023 that it was her original voicebank.
  22. https://twitter.com/liondance_1214/status/1705180554143142316 - Summary by @liondance_1214
  23. https://twitter.com/uchuuzentai/status/1705200035284033563 - English translation of summary by @uchuuzentai
  24. http://km4osm.blog.fc2.com/blog-entry-373.html
  25. https://www.youtube.com/watch?v=VrsMnzhSm6g