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SeeU VOCALOID3 English | Songs Albums Notable Originals

This article is about the VOCALOID3 software known as a voicebank. If you are looking for the VOCALOID character then click here.


On June 6, 2011, a demo called I=Fantasy that was produced by Bang Shi Hyuk (a.k.a. Hitman Bang), was introduced during the VOCALOID3 announcement.[1] On August 30, her name and appearance was revealed.

Before her release, SBS A&T uploaded a video on November 8, 2011 of various idols (Bang Shi Hyuk, Jeong Jinwoon (2AM), Jo Kwon (2AM), David Oh, Lim Jeong Hee, and U-Kiss) introducing and supporting SeeU's release.

Pre-orders for SeeU took place on October 14, 2011 and a community called CreCrew was opened. She was released on the 21st of the same month. In Japan, SeeU was released on December 16, 2011, the sale in Japan ended on March 1, 2013.

Despite the controversy SV01 SeeU was still able to be purchased from CreCrew Goods website[2] until its final closure in early 2017. As of late August 2017, she is available for purchase on the site Character Planet as a download, a physical release, a bundle with UNI (dubbed the 'SeeUNI Library Set'), and a VOCALOID4 Starter Pack with UNI (dubbed the 'SeeUNI Starter Pack'). There was a promotional sale to commemorate her official birthday and release, which will run from August 23, to September 6.


On September 22, 2023, ST MEDiA Co., Ltd. hosted a livestream to discuss new information. Regarding SeeU, there were still SBS A&T employees who were still fond of her and would like to work on her again, but the executives disapproved as they believed that it would not be profitable. SBS A&T still owned the rights to SeeU fully and was the final decisionmaker in regards to anything related to her. ST MEDiA considered purchasing her license from SBS A&T, but the individuals who were worked on her were hurt, so it was not possible as ST MEDiA felt it would be disrespectful to do. In addition, the idea of replacing SeeU's voice provider was also difficult. Instead, it was decided to "stop dreaming" about a SeeU update or remake as it was impossible without SBS A&T's permission.

In regards to SeeU's stocking issues, it was confirmed that she only had the stock number from her original launch. Once they were sold out, there was nothing left, though the Japanese editions were still available. There was a Chinese company in 2020 who had purchased new SeeU serial codes and intended to sell her with a Chinese edition packaging, but due to the COVID-19 outbreak, this never came to fruition. It was confirmed that there were 400 SeeU serial codes leftover from that batch, and after they sell out, it was over for SeeU. The last 400 codes would be potentially sold as a packaged version. The current plan was to update the packaging design, in addition to SeeU herself, so it could be treated as a commemorative release. This was planned to be a possible crowdfunding campaign later in the year, likely October, and any leftover boxes after the crowdfund would be sold online. SeeU's design would be modernized as the company felt that it would be difficult to 3D model, but the changes would not be too major, such as a different hairstyle. It was confirmed that KKUEM might not return as the illustrator due to a scheduling conflict. Despite that these final codes would mark the end of SeeU as a voice library and that there were no plans in selling SeeU as a digital download, ST MEDiA still wanted to continue in promoting her character. It was also mentioned that there was no stopping users from turning SeeU into an AI voice library or dataset for personal use.[3][4][5]

Product Information[]




RUN YouTube
Never Let You Go Remix YouTube
Shining Star YouTube
I=Fantasy YouTube
Umbrella YouTube
Mission (Yamaha Promotion) NicoNico
I=Fantasy Breathing Effect YouTube



願いを込めて (Negai wo Komete) YouTube
明日を向いて (Ashita wo Muite) YouTube
Mission (Yamaha Promotion) NicoNico
ITA-BASAMI (Yamaha Promotion) YouTube
神話色のミステリイ (Shinwairo no Mistery) (Yamaha Promotion) YouTube
こんなアタシDOでShow!? (Konna Atashi DO de Show!?) (Yamaha Promotion) NicoNico

System Requirements[]

  • OS: Windows 7(32/64bit) / Vista(32bit) / XP(32bit)
  • CPU: Celeron Dual Core 2.1 or more recommended
  • Memory: 1GB or more recommended
  • HDD: more than 5GB empty spaces are required
    • more than 5.2GB empty spaces are required for the SeeU Starter Pack
  • etc.: Sound-card hardware is needed.
    Internet accessibility is needed.
    disc format:DVD-ROM


SeeU is set to her Korean vocal by default and users will have to manually select her Japanese vocal to access it.


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

SeeU is a bilingual VOCALOID that sings in both Korean and Japanese. Her vocal is sometimes found to be 'cute' and, since it was voiced by a teenage singer, one of the more accurate VOCALOIDs to represent teenage vocal.

Vocal traits as noted:
  • Both her Korean and Japanese vocals at the time housed the highest known optimum vocal range released for VOCALOID3, their status was unchallenged for much of the VOCALOID3 engines development.
  • At a optimum range of #C5, SeeU has the second highest vocal range of VOCALOID3, beaten by Chika and kokone who jointly hold the highest optimum range at #D5.
  • She is quite husky in lower ranges, but clearer in higher.

Individual Vocals[]

Product Information
  Genre: K-Pop, Pop Ballad  Optimum Range: C3 ~ C5  Optimum Tempo: 60 ~ 170 BPM
  Total Tempo (min-max): 110 BPM  No. of Keys: W ~ 15, B ~ 10, Total ~ 25
Package details as noted:

SeeU's Korean vocal.

Vocal traits as noted:
  • Her Korean voicebank has a slightly deeper and more powerful voice than her Japanese voicebank.
Phonetic notes as noted:
  • Several English phonemes not native to Korean were added, as SBS noted many Korean sounds are similar or the same in English so this allows her to recreate a certain level of "English" using her Korean voicebank (such as the 'f' consonant [f],the 'v' consonant [v] and the 's' consonant [z], all of which cannot be pronounced in the Korean language).[6]
  • SeeU's voicebank has some issues sounding out certain consonants such as ㄹ(r) and ㅈ(c). Her pronunciation of ㄹ varies in that in may sound too trilled (like a rolled Spanish R) or not distinguishable enough depending on the vowels around it. Her pronunciation of ㅈ is too muffled and difficult to work around using only her Korean voicebank.
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.
  • Despite the inclusion of extra English phonetics, while results are understandable they are often low quality. At best results are choppy and sounds are heavily accented.
Voicebank sample


Product Information
  Genre: J-Pop, Pop Ballad  Optimum Range: C3 ~ C5  Optimum Tempo: 60 ~ 170 BPM
  Total Tempo (min-max): 110 BPM  No. of Keys: W ~ 15, B ~ 10, Total ~ 25
Package details as noted:

The Japanese vocal. She has a slight Korean accent in her pronunciation.

Vocal traits as noted:
  • Her Japanese voicebank has a slightly lighter and sweeter voice than her Korean voicebank.
Phonetic notes as noted:
  • Her pronunciation of [s] is slightly aspirated.
  • Her pronunciation of the sequence [ts M] ( tsu) has a weak t, causing it to more sound like [s M] ( su) respectively.
  • Her mid vowels may sound more tense or closed than they should. She has difficulty pronouncing the sequence [w o], which however is no longer present in Standard Japanese pronunciation.
  • Her pronunciation of [4] has similar issues to her pronunciation of ㄹ in her Korean voicebank, being either too weak or too trilled.
  • Her pronunciation of fricative and affricate consonants (s, z, ts, j, and ch) has a Korean accent in which they are pronounced quickly and are slightly lisped.
  • 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
Voicebank sample

SeeU Japanese VOCALOID3