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Hatsune Miku

Singing voice synthesizer software

  • 16 min read
  • 4 chapters

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Released in August 2007, Hatsune Miku was the second product built on Yamaha Corporation's Vocaloid 2 engine and the first Japanese voicebank for the platform. Subsequent updates have expanded her functionality across Vocaloid 3, Vocaloid 4, and Vocaloid 6 technology, alongside Crypton's proprietary Piapro Studio editor.

The name of the character comes from merging the Japanese words for first (初, hatsu), sound (音, ne), and future (ミク, miku), thus meaning "the first sound of the future", which, along with her code name, refers to her position as the first of Crypton's "Character Vocal Series" (abbreviated "CV Series"), preceding Kagamine Rin/Len (code-named CV02) and Megurine Luka (code-named CV03). The number 01 can be seen on her left shoulder in official artwork.

Development

Hatsune Miku was the first Vocaloid developed by Crypton Future Media after they handled the release of the Yamaha vocal Meiko and Kaito. Miku was intended to be the first of a series of Vocaloids called the "Character Vocal Series" (abbreviated "CV Series"), which included Kagamine Rin/Len and Megurine Luka. Each had a particular concept and vocal direction.

During Miku's development, Crypton decided to create an illustrated persona to represent the voice. The software was initially targeted primarily at professional music producers, as a broader consumer market for vocal synthesizers had not yet emerged.

The task of coming up with Miku's image went to the manga artist Kei Garō, who was already known from doing art for various doujin artists. When Kei designed Miku, his only direction was her color scheme (based on Yamaha's synthesizer's signature turquoise color), and that she was an android. Various aspects of her clothing, such as the computer interface on her left sleeve, were based on Yamaha's synthesizers.

Miku's vocal samples were taken from voice actress Saki Fujita at a controlled pitch and tone. Those samples all contain a single Japanese phonic that, when strung together, creates full lyrics and phrases.

Hatsune Miku was first released on August 31, 2007, as the third commercially sold Vocaloid library. Crypton chose to market Miku as "an android diva in the near-future world where songs are lost." Hatsune Miku was released for Vocaloid 3 on August 31, 2013, including an English vocal library.

Additional software

On April 30, 2010, an add-on for Vocaloid 2 called Hatsune Miku Append was released. Consisting of six different timbres for the voice: Soft (gentle timbre), Sweet (young, chibi quality), Dark (mature and melancholic), Vivid (bright and cheerful), Solid (loud, clear voice), and Light (innocent and angelic). Miku Append was created to expand Miku's voice library, and as such requires the original program to be installed on the user's computer. This was the first time a Vocaloid had such a release, and more Append versions were reported from Crypton Future Media at later dates.

It was mentioned that a seventh Append voicebank, a falsetto voice, had been recorded; however, since the developers did not think it would be useful on its own, no plans were made for an independent release. Miku's English vocal was due for a Vocaloid 2 release, but it was not released in the engine due to low quality.

To aid in the production of 3D animations, the unofficial program MikuMikuDance was developed by an independent programmer. The freeware software allowed a boom in fan-made animations to be developed, as well as being a boost for promoting Vocaloid songs themselves.

An English voicebank for Hatsune Miku was officially announced in 2013, following earlier development plans from 2010. The decision to move to Vocaloid 3 and lack of experience with English pronunciation delayed the release. It was finally released on August 31, 2013, as a digital distribution.

The Hatsune Miku Vocaloid 3 Japanese vocal library was released on September 26, 2013. It contained updates to all previous Vocaloid 2 vocals except Vivid and Light. These were later released separately, though they were initially offered to anyone who already owned Hatsune Miku, Hatsune Miku Append, and Hatsune Miku V3. Once imported into Vocaloid 4, all Hatsune Miku V3 vocals could use the new Cross-Synthesis system (XSY) built for the new engine of Vocaloid 3. The voice was imported into a device called Pocket Miku, released on April 3, 2014.

Hatsune Miku received an update for Yamaha's Vocaloid 4 engine under the name of Hatsune Miku V4X. It makes use of the new EVEC system for Piapro Studio, a VSTi plugin used as an alternative to the traditional Vocaloid Editor. EVEC consists of recorded vowels. Along with the consonant, a different vocal tone can be achieved. Two vocal tones are included in the EVEC system: Power and Soft. Along with the new EVEC system, phoneme errors found in Miku's V2 and V3 voicebanks were resolved to improve vocal manipulation. Hatsune Miku V4X/V4 English was released on August 30, 2016.

A Mandarin Chinese voicebank was released in September 2017, making Hatsune Miku the first officially trilingual Vocaloid product. Her Chinese name is 初音未来; Chūyīn Wèilái; 未来 are the kanji characters for her given name, Miku.

At Magical Mirai 2019, head of Crypton Future Media's Character Development Wataru Sasaki announced that Hatsune Miku would be departing Yamaha's Vocaloid engine, and would not be utilizing Vocaloid 5 for any further development of their voice banks. It was established that the "identity" of the voices would remain the same, however. Then, on December 24, 2019, Sasaki announced that information about Hatsune Miku NT (Newtype) would be released. On the same day, Sonicwire announced that the release of Hatsune Miku NT was planned for summer 2020, and those who had registered for the software early would be able to access a prototype of the new engine, Piapro Studio NT. After delays, the Piapro Studio prototype was released on June 4, 2020. The full version of Piapro Studio and Hatsune Miku NT were released on November 27, 2020.

On August 1, 2024, Sonicwire posted that on August 30, 2024, they would be releasing the Piapro Characters Super Pack, a voicebank bundle that includes a Hatsune Miku variant for Vocaloid 4. In this post, it was also announced that a Hatsune Miku V6 would be released, compatible with Vocaloid 6 and its AI voice synthesization tools. Hatsune Miku V6 was eventually released on April 14, 2026 after prolonged development delays, and included two voicebanks; Original and Soft, capable of singing in Japanese, English and Chinese. It was also announced that an updated version of Hatsune Miku NT was anticipated for the end of the year. Early access for Hatsune Miku NT V2 was released on October 23, 2024, before being officially launched on March 18, 2025.

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