View source for Kasane Teto

{{Short description|Vocalbank on UTAU and SynthV}}
{{Use British English|date=June 2024}}
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{{Sources exist|date=June 2024}}
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{{Infobox software
| name                   = Kasane Teto
| logo                   = Tetologo roma.png
| screenshot             = Teto Kasane illustration.png
| screenshot size        = 155px
| caption                = 
| author                 = 
| developer              = TwinDrill<br />[[AH-Software|AH-Software Co. Ltd. ]]
| released               = April 1, 2008
| latest release version = Kasane Teto AI Lite Synthesizer V Studio
| latest release date    = May 8, 2023
| latest preview version = 
| latest preview date    = 
| programming language   = 
| operating system       = 
| platform               = 
| language               = Japanese, English
| genre                  = Vocal Synthesizer Application
| license                = 
| website                = https://kasaneteto.jp/
}}
{{Infobox character
| name = Kasane Teto
| first_major = UTAU
| designer = Sen (線)
| voice = Oyamano Mayo
| full_name = {{nihongo2|重音テト}} ({{transl|ja|Kasane Teto}})
| image = 
| gender = [[Chimera (mythology)|Chimera]]
}}

'''Kasane Teto''' ([[Japanese language|Japanese]]: 重音テト) is a virtual singer software and its character created on the japanese [[textboard]] [[2channel]] on [[April Fools' Day]], 2008.<ref name=":0">{{Cite web |url=https://kasaneteto.jp/about/|script-title=ja:重音テトとは? |title=Kasane Teto to wa?|language=ja|trans-title=What is Kasane Teto?|publisher=Twindrill|access-date=June 16, 2024}}</ref>　Although the software was created as a [[hoax]] and did not exist, it later became compatible with singing voice synthesis software, allowing it to sing and was introduced as a "diva born from a hoax".<ref name=":1">{{Cite web|last=Takigawa|first=Kyoko|url=https://www.j-cast.com/2023/04/27460462.html?p=all|script-title=ja:嘘から生まれた歌姫 ｢重音テト｣ パロディが ｢本物｣の商業ソフトになるまで...歩んだ15年|title=Uso kara Umareta Utahime ｢Kasane Teto｣ Parodi ga「Honmono」no Shōgyō Shifuto made ... Ayunda Jūgonen|language=ja|trans-title=Born from a lie, the past 15 years have seen "Kasane Teto" shift from being a fake parody of a diva to being commercial software|date=27 April 2023 |publisher=J-Cast, Inc|access-date=16 June 2024}}</ref>

Character names, hairstyles, genders, ages, special skills, and other settings were randomly selected from among the suggestions of 2channel users and consolidated into a single character, which was released on 1 April 2008 under the guise of a software release announcement page, along with sample voices of synthesised style effected voices.

At the time of its release, Kasane Teto had no actual software, but soon after its release, the singing voice synthesis software "[[Utau]]" was made available by volunteers, and Kasane Teto became a character that can actually be made to sing.<ref name=":0" />

As a derivative character of Hatsune Miku, Kasane Teto gained popularity among vocaloid fans.<ref>{{Cite |url=https://www.cyzo.com/2008/05/post_539_entry.html|script-title=ja:日経新聞 社説でJASRACを皮肉る|title=Nikkei Shimbun Shasetsu de JASRAC wo Hinikuru|language=ja|trans-title=Nikkei Shimbun editorial satorises JASRAC|date=6 May 2008|work=Daily Cyzo|access-date=17 June 2024}}</ref> On [[Niconico]], Japan's leading video sharing service, the "Kasane Teto" tag exceeded 500 in six months, and the song "嘘の歌姫(Uso no utahime/Diva of hoax)" created using Kasane Teto achieved 100,000 views and was inducted into the Vocaloid Hall of Fame.<ref name=":2">{{Cite web|url=https://kasaneteto.jp/history/|script-title=ja:歴史･年表|title=Rekishi･Nepyō|language=ja|trans-title=History/Chronology|publisher=Twindrill|access-date=16 June 2024}}</ref>

The rights holders who provided the character design and voice of Kasane Teto established the circle "Twin Drill" in 2009 to promote and manage the character. Although Kasane Teto was a [[parody]] character of Crypton's vocaloid series, Twindrill organised the rights and established a cooperative relationship with Crypton from 2009 to 2010. Since 2010, Crypton has been the point of contact for commercial use.<ref name=":1" />

Since the rights were sorted out, Kasane Teto has been active in many fields, including appearing in [[Sega]]'s [[Music video game|music game]] "[[Hatsune Miku: Project DIVA|Hatsune Miku -Project DIVA-]]", becoming a promotional character for [[Hokkaido Broadcasting]], becoming a [[Nendoroid]] plastic figure, performing with [[Nakamura Shidō II]] on the [[Kabuki]] stage, and publishing a novel motifed on Kasane Teto.<ref name=":2" />

Kasane teto was supported as a voice model in 2021 by [[TALQu]], a deep learning-based free speech software, and in 2023 by [[Synthesizer V AI]], a commercial singing voice synthesis software.<ref>{{Cite web |title=TALQu Voice Model Data |url=https://kasaneteto.jp/talqu/ |publisher=Twindrill|access-date=16 June 2024}}</ref><ref>{{Cite web |author=<!--Staff writer(s); no by-line-->|url=https://www.ah-soft.com/press/synth-v/20230403.html|script-title=ja:誕生から15年, 多くの方に愛されたあのキャラクターがAI歌声データベースに! ｢Synthesizer V AI 重音テト｣ 2023年4月27日発売 |title=Tanjō kara Jūgonen, Ooku no Kata ga Aisareta Ano Kyrakuta ga AI Detabesu ni! ｢Synthesizer V AI Kasane Teto｣ Nisennijūnen Shigatsu Nijunananichi Hatsubai |language=ja|trans-title=Born 15 years ago and loved by many, character「Synthesizer AI Kasane Teto｣ added to Vocaloid Database: goes on sale on 27 April 2023.|date=3 April 2023|publisher=[[AH-Software|AHS Co. Ltd]]|access-date=16 June 2024}}</ref>

== Character ==
Kasane Teto is a [[Chimera (mythology)|chimera]]. She is 35 years old in chimera age.

In her earliest design, Teto was 159.5 centimetres tall and weighed 47 killograms.

== History ==
=== Creation ===
Kasane Teto's origins come from "[[2channel]]", a Japanese bulletin board.
In 2008, a group of users devised a plan to make a fake vocaloid. On 13 April 2008, The voicebank for Teto was released.

=== 2010s and 2020s ===
Teto continued to make an impact on the vocaloid community with many songs being released.
In 2012, a DLC for [[Hatsune Miku: Project DIVA  F|Hatsune Miku: Project Diva F]] featured her.<ref>{{Cite web |last=Sahdev |first=Ishaan |date=6 November 2012|title=Hatsune Miku: Project Diva f DLC Adds "Unofficial" Vocaloids Neru, Haku And Teto |url=https://www.siliconera.com/hatsune-miku-project-diva-f-dlc-adds-unofficial-vocaloids-neru-haku-and-teto/ |access-date=15 June 2024|website=Siliconera |language=en-US}}</ref>
In 2013, she appeared for Hatsune Miku's act in the Sapporo Snow Festival 2013.<ref>{{cite web|last=Loo|first=Egan|url=https://www.animenewsnetwork.com/interest/2013-02-03/snow-miku-revealed-for-sapporo-snow-festival-2013|title=Snow Miku Revealed for Sapporo Snow Festival 2013|date=3 February 2013|website=Anime News Network|access-date=15 June 2024}}</ref>

=== SynthV ===
For the 15th anniversary of Teto on 1 April 2023, Japanese software developer [[AH-Software]] announced they would make a "Synthersizer V" for the character. This was released on 27 April 2023.<ref name="Bueno">{{Cite web |last=Bueno |first=Daniel |date=4 April 2023 |title=Kasane Teto Synthesizer V Vocaloid Voice Arrives in April |url=https://www.siliconera.com/kasane-teto-synthesizer-v-vocaloid-voice-arrives-in-april/ |access-date=15 June 2024|website=Siliconera |language=en-US}}</ref>

== References ==
{{reflist}}

{{Hatsune Miku: Project DIVA}}

{{music-software-stub}}

[[Category:Fictional characters introduced in 2008]]
[[Category:Fictional singers]]
[[Category:Japanese idols]]
[[Category:Japanese popular culture]]
[[Category:2008 software]][[Category:2009 software]]
[[Category:2010 software]]
[[Category:2012 software]]
[[Category:2015 software]]
[[Category:2018 software]]
[[Category:2021 software]]
[[Category:2023 software]]
[[Category:Fictional non-binary people]]
[[Category:April Fools' Day jokes]]