Status

On February 13, 2025, new details regarding the Synthesizer V AI Yumenokessho series were revealed. The official announcement confirmed the upcoming release of Synthesizer V 2 AI HALO and PASTEL, along with Synthesizer V 2 AI upgrades for POPY and ROSE. Pre-orders for a limited production package version became available through the Bushiroad Online Store on the same day.^[11]

The release schedule for Synthesizer V 2 AI POPY and ROSE was also confirmed, with pre-orders for the Limited Production Package Versions available from February 13 to April 3 at 18:00 JST, ahead of their scheduled release on May 23, while the Download Versions would be available for purchase starting April 25.^[12] Owners of the original Synthesizer V AI POPY and ROSE would be entitled to upgrade to their Synthesizer V 2 AI versions at a discount;^[13] also, it was announced that the outgoing Studio Pro starter pack editions of the original POPY and ROSE would be discontinued from sale on April 25.^[14]

On February 13, 2025, new details regarding the Synthesizer V AI Yumenokessho series were revealed. The official announcement confirmed the upcoming release of Synthesizer V 2 AI HALO and PASTEL, along with Synthesizer V 2 AI upgrades for POPY and ROSE. Pre-orders for a limited production package version became available through the Bushiroad Online Store on the same day.^[11]

The release schedule for Synthesizer V 2 AI POPY and ROSE was also confirmed, with pre-orders for the Limited Production Package Versions available from February 13 to April 3 at 18:00 JST, ahead of their scheduled release on May 23, while the Download Versions would be available for purchase starting April 25.^[12] Owners of the original Synthesizer V AI POPY and ROSE would be entitled to upgrade to their Synthesizer V 2 AI versions at a discount;^[13] also, it was announced that the outgoing Studio Pro starter pack editions of the original POPY and ROSE would be discontinued from sale on April 25.^[14]

On March 1, 2025, two characters were introduced under the names Nakuru and Natsume Itsuki by the Japanese content production company Hifumi,inc. based on the voices of the Japanese virtual singers Nakuru Aitsuki and Itsuki Natsume respectively, and were announced to be in development for Synthesizer V Studio 2. Nakuru was announced to be illustrated by Japanese illustrator Nekoyama Iori. An official website was opened for the pair and more information was announced to be released in the future. The release date at the time was undecided.^[15] On March 3, a press release with PR TIMES released additional information including concept artwork, the full illustrations for both characters and a brief description for each vocalist. Nakuru was described as a singing voice database that allows for a crystal clear singing voice and a wide range of expression, including whisper and mellow to pop, with a variety of vocal tones suitable for all genres.^[16][17][18] A short sample demonstration showcasing Nakuru's vocals was uploaded by producer America Minyo Kenkyukai (アメリカ民謡研究会) on their official YouTube channel.^[19]

On March 21, the day Synthesizer V Studio 2 was released, the boxarts for Nakuru and Itsuki were revealed; it was also announced that both physical and digital editions (including both standalone and Starter Pack options) would be released on April 27.^[20]

On March 1, 2025, two characters were introduced under the names Nakuru and Natsume Itsuki by the Japanese content production company Hifumi,inc. based on the voices of the Japanese virtual singers Nakuru Aitsuki and Itsuki Natsume respectively, and were announced to be in development for Synthesizer V Studio 2. Natsume Itsuki was announced to be illustrated by Japanese illustrator hanagata (花ヶ田). An official website was opened for the pair and more information was announced to be released in the future. The release date at the time was undecided.^[21] On March 3, a press release with PR TIMES released additional information including concept artwork, the full illustrations for both characters and a brief description for each vocalist. Natsume Itsuki was described as a singing voice database with a lively, girlish singing voice and features a core and brilliant high-pitched voice, having a strong presence in not only cute pop songs but also intense rock songs, and is capable of achieving a fast-paced singing voice.^[18] On March 5, her first demonstration was uploaded by to the official Itsuki Natsume YouTube Channel.^[22]

On March 21, the day Synthesizer V Studio 2 was released, the boxarts for Nakuru and Itsuki were revealed; it was also announced that both physical and digital editions (including both standalone and Starter Pack options) would be released on April 27.^[23]

On February 14, 2025, AUDIOLOGIE Co., Ltd. announced that they were working closely with Dreamtonics to eventually upgrade their current lineup of voice databases to Synthesizer V Studio 2, and that existing owners of ANRI Arcane, JUN, and NOA Hex would receive preferential (discounted) upgrade options as soon as pre-orders become available.^[24]

One month later on March 14, JUN Nocturne, the Synthesizer V Studio 2 version of JUN, was announced,^[25] and pre-orders for its upgrade version (the discounted option for existing JUN owners) were opened online, with release date set for around the month of May.^[26] A physical add-on edition was later announced on March 20.^[27]

On February 13, 2025, TWINDRILL tweeted that a Synthesizer V 2 AI upgrade for Kasane Teto was in the works, with no release date given.^[28]

On February 13, 2025, Akasako tweeted that Koharu Rikka, Natsuki Karin, and Hanakuma Chifuyu were currently being upgraded for Synthesizer V Studio 2, but no release date was provided.^[29]

On February 13, 2025, Akasako tweeted that Koharu Rikka, Natsuki Karin, and Hanakuma Chifuyu were currently being upgraded for Synthesizer V Studio 2, but no release date was provided.^[29]

On February 13, 2025, Akasako tweeted that Koharu Rikka, Natsuki Karin, and Hanakuma Chifuyu were currently being upgraded for Synthesizer V Studio 2, but no release date was provided.^[29]

On February 13, 2025, Internet Co., Ltd. announced that they planned to create Synthesizer V 2 AI upgrades for their vocals (without naming any of them in particular), but that it would take time to carry out.^[30][31] This was confirmed by GUMI's official Twitter account on February 16, stating that Megpoid 2 would become available later in the future.^[32] On a video published on February 21, GUMI was again named among those vocals receiving the eventual SVS2 upgrade in the future.^[33]

On February 13, 2025, Internet Co., Ltd. announced that they planned to create Synthesizer V 2 AI upgrades for their vocals (without naming any of them in particular), but that it would take time to carry out.^[30][31] On a video published on February 21, Hibiki Koto was named among those vocals receiving the eventual SVS2 upgrade in the future.^[33]

On February 13, 2025, Internet Co., Ltd. announced that they planned to create Synthesizer V 2 AI upgrades for their vocals (without naming any of them in particular), but that it would take time to carry out.^[30][31] On a video published on February 21, Otomachi Una was named among those vocals receiving the eventual SVS2 upgrade in the future.^[33]

On February 14, 2025, AUDIOLOGIE Co., Ltd. announced that they were working closely with Dreamtonics to eventually upgrade their current lineup of voice databases to Synthesizer V Studio 2, and that existing owners of ANRI Arcane, JUN, and NOA Hex would receive preferential (discounted) upgrade options as soon as pre-orders become available.^[24]

On February 14, 2025, AUDIOLOGIE Co., Ltd. announced that they were working closely with Dreamtonics to eventually upgrade their current lineup of voice databases to Synthesizer V Studio 2, and that existing owners of ANRI Arcane, JUN, and NOA Hex would receive preferential (discounted) upgrade options as soon as pre-orders become available.^[24]

On February 20, 2025, during AH-Software's 211th official livestream, it was announced that Synthesizer V 2 AI singing voice databases for the sisters Asumi Shuo and Ririse (who originally debuted in 2021 with pitagoe voice samples before receiving VOICEPEAK text-to-speech voice databases in January 2023) were to be produced. No release date was given.^[34]

On February 20, 2025, during AH-Software's 211th official livestream, it was announced that Synthesizer V 2 AI singing voice databases for the sisters Asumi Shuo and Ririse were to be produced. No release date was given.^[34]

On February 7, 2025, Kyomachi Seika opened via GreenFunding a crowdfund campaign for a concert titled Songs that Transcend Time and Space III, to be held on September 14; the crowdfunder was expected to close on March 10.^[35] On February 21, with 72% of the main goal reached, Seika announced its first stretch goal, in the form of a Synthesizer V 2 AI update for her singing voice database.^[36] The crowdfunder's main goal was met early on February 26,^[37] while the Synthesizer V 2-specific stretch goal was met the next day.^[38]

Late on March 13, 2025, after receiving inquiries from customers regarding support for Topaz on the upcoming Synthesizer V Studio 2, GEMVOX announced that an upgrade was scheduled to be done,^[39] with further details to be announced at a later date.^[40]

On March 22, 2024, Eclipsed Sounds, LLC redesigned its website. A new "upcoming genre-focused vocal line" provisionally dubbed "Eclipsed Sounds Phase 2" was added to the bottom of the homepage; while the Starry Court (SOLARIA, ASTERIAN, SAROS, and a then-unnamed Alto vocal that months later would adopt the name NYL) was described as a "lineup of genre-flexible vocalists", Phase 2 was said to "provide voices designed to suit single genres, with a lineup based on our current backlog of user requests", with no further information about any specific vocal to be grouped there.^[41]

On January 19, 2025, Eclipsed Sounds published a video on YouTube announcing that Phase 2 would be named "Tone Chroma", with more information to be provided later through a new webpage that was opened for it.^[42] This new webpage, apart from embedding the YouTube video above, invited viewers to visit this year's NAMM Show, whose listing for Eclipsed Sounds stated that the company would reveal new vocal products (very likely at least a prototype of at least one of the upcoming Tone Chroma voice databases) alongside their existing ones.^[43] The YouTube video briefly highlighted seven colors during seven separate timestamps: red, orange, yellow, green, blue, violet, and magenta; while red and violet were given the codenames R-01 and V-01 on two teasers published on January 21^[44][45] (and two days later formally given the names HXVOC and GALENAIA),^[46][47] the vocals corresponding to the other five colors have not yet been revealed or named.

On March 11, 2023, in response to some fans' questions regarding the production of AI voice databases, Ddickky said that the other "AI" voice databases were promoted with Xingchen Infinity and that the voice providers were invited at the same time in the prior year. He said that he had no issue with the funding, but that some of the voice providers were concerned that the AI would be "stealing their jobs" while some were procrastinating with the work until recently. There was also a concern that the databases would not sound like the previous R1 and R2 "Standard" versions. The commercialization would be determined after the production was completed, but it was expected to be handled similarly to Xingchen Infinity and would be sold directly since the technical workload and input cost were completely different. If there were no issues or delays, Chiyu and Minus were expected for 2023.^[48][49][50]

Minus AI, who was formally given the name "Yongye Minus", released on December 17; no further word on Chiyu AI was heard from since her announcement in March.

On December 8, 2024, when asked by a fan in response to the announcement of Haiyi receiving a full AI voice database sometime in 2025, unofficial news outlet SynthV News responded that Chiyu AI had sounded too much like her voice provider YouMao (UNEKO), leading Quadimension to respect the latter's wishes and postpone the voice database indefinitely, with a note that she "most likely" would be "re-recorded at [a] later date".^[51]

Shirakami Meito debuted as a virtual utaite (or VSinger)^[52] under the En-gene label (a joint venture co-owned by TMIK Co., Ltd. and agehasprings Party) on March 22, 2024.^[53] Kazunari Shirane, from agehasprings Party, was credited for "vocal programming" on all of her song uploads, thus hinting at her voice being based on a vocal-synthesis engine that would eventually be revealed to be Synthesizer V in the coming days (at least on YouTube and very deep into its video descriptions, as the songs were not yet being tagged as such on bilibili, TikTok, or Twitter until much later). Neither Dreamtonics Co., Ltd. nor any other then-known vocal-synthesizer company was known to have retweeted, shared, or commented on her content, thus contributing to keeping her out of the vocal-synth community's radar.

On April 20, Meito started to sign bilibili-centric tweets with the phrase "M-type" (M型);^[54][55] it was unknown what was being meant with that. Later on April 21, she tweeted about Chinese language being installed into her system, again ending the tweet with "M-type",^[56] which may have implied that M-type was a new voice-database version trained with Mandarin-Chinese song material that would use Cross-lingual Singing Synthesis to sing in that new language. On April 23, her first Mandarin song cover was demonstrated using this updated library.^[57]

On May 31, it was announced on a press release by En-gene that Shirakami Meito had recorded a new jingle for Japanese radio station FM802, which was celebrating its 35th anniversary. The jingle was a joint composition between Kazuma Nagasawa (a songwriter from agehasprings) and AI music-track generation software FIMMIGRM (a product of TMIK Co., Ltd.), with arrangement by Shogo Ohnishi (also from agehasprings); on this press release, En-gene confirmed that Meito's voice was based on an original Synthesizer V voice database. The jingle was set to premiere via broadcast on June 1.^[58]

On June 6, the western vocal-synth community started to take notice of her existence as a private Synthesizer V vocal.^[59][60][61]

On February 7, 2025, Masataka Matsutoya, producer and husband of renowned Japanese singer Yumi Matsutoya, announced in a news article that for her upcoming 40th album, slated for release in the autumn of this year, a private Synthesizer V voice database based on her young voice from an old multitrack recording (which was re-discovered by the couple from long-term storage about four to five years earlier and also had served as the basis for an earlier private AI vocal, dubbed "AI Yumi Arai", which was featured in her 2022 song "Call me back")^[63][64] would be developed to allow Yumi's singing voice to "travel between past and present". The intent was for a synthesized version of Yumi's young singing voice from the past to co-exist with her present-day natural singing voice (which would still remain the main focus of her yet-untitled 40th album). This production process combining her current voice with her synthetic voice was dubbed the "Chrono Recording System".^[65][66]

AH-Software Co. Ltd. shared the news on Twitter along with a note announcing that they would provide technical assistance to the project.^[67]

On December 23, 2021, it was announced that Chiyu, Shian, Cangqiong, Haiyi, Muxin, and Minus were expected to be upgraded with AI voice databases and would be able to support Synthesizer V Studio 1.5.0's Cross-lingual Synthesis capabilities. It was clarified that the AI versions were trained by the Standard voice databases, and were not meant to be replacements for Standard nor would the update be available directly via the editor. As a separate type of voice database, the new libraries would need to be repacked in new installation packages, which required separate activation codes. The upgrades would be distributed to existing users for free and prices would be raised for new buyers soon due to the new inclusions.^{[76][77][78][79][80]} They were originally slated for release that day, however, Beijing Photek decided to delay them due to a lack of confidence about their performance as rushed products. A limited beta-testing would run first. The voice databases would release after their performances were proven satisfactory. By then, Quadimension hoped to find an efficient way to distribute the AI activation codes.^[81] According to Creuzer, one of the beta testers, Cangqiong AI was the only beta voice database out of the six that was available at the time. Haiyi AI's beta was expected to be on the way.^[82] On December 30, the voice databases were officially called "Synthesizer V Plus".^[83]

Throughout 2022, Cangqiong Synthesizer V Plus and Muxin Synthesizer V Plus received multiple examples demonstrating their capabilities as Standard-trained AI voice databases, including the Cross-lingual Singing Synthesis function. However, news about the development and future releases in general for all six characters were not available. On September 29, in response to a fan's question about whether the Plus versions of the six voice databases would be released soon, Quadimension wrote that it was probably not likely due to the qualities being unfit for commercial use.^[84] On November 22, in response to a fan, Ddickky confirmed that the Plus series of voice databases were created with the intention of demonstrating the effects of training AI with Standard voice databases and were not meant to be released. The voice databases were sent to shareholders as a technology demonstration and not as a full product update. As these voice databases were to show the effects and technology of splicing AI training, they could not be noted as "Synthesizer V AI" as they would affect the brand quality of AI voice databases, thus the need of calling these "Synthesizer V Plus".^[85][86]

On July 7, 2023, at the end of the "V.I.P -Virtual Isotope Phenomenon- 1st" livestream, it was announced that KAFU would be in development for Synthesizer V AI and was expected to release in Winter 2023.^[87][88] She was confirmed to be developed by AH-Software Co. Ltd., though would be published by KAMITSUBAKI STUDIO.^[89] Pre-orders for KAFU's physical copy and starter pack were opened on September 4 and would run until November 27 at 12:00 JST or if the available stock had sold out as she is a made-to-order product. Her release date was confirmed to be January 15, 2024.^[90]

On December 23, KAMITSUBAKI announced that her release date was being postponed due to various unspecified circumstances, with new release date being yet undetermined but to be announced as soon as details were decided.^[91]

On May 14, 2024, it was revealed by KAMITSUBAKI that KAFU was indefinitely delayed due to her voice provider KAF being extremely uncomfortable with the realistic nature of Synthesizer V and with how it allowed KAFU to perfectly mimic her vocal traits on her published demos.^[92]

On January 19, 2025, PIEDPIPER from KAMITSUBAKI issued a statement definitely cancelling Synthesizer V KAFU. Apologies were given to people who were expecting her postponed release, and thanks were extended to Dreamtonics Co., Ltd. and AH-Software Co. Ltd. for their involvement in her development.^[93]

VOLOR confirmed through email that Yamine Renri's update was postponed due to the COVID-19 pandemic, but they confirmed that they were thinking about giving her a Chinese voice database due to her voice provider studying it.^[94] News about this potential voice database is currently unknown.

Throughout 2020, HirotoP had been composing tweets in regards to CUL and the many parts of her project. He revealed that REV was meant to become a VOCALOID, but his project fell through, and later revealed that CUL had conceptual sisters themed around the following colors: blue, white, yellow, and red. It was also confirmed that she had a twin sister known as "Black CUL" (Wet Crow). In response to a fan, HirotoP also expressed interest in updating CUL but did not give further details.^[95]

It was confirmed that after ROSA is released, an official livestream would be launched for announcements.^[96] Depending on if ROSA sells well, REV may also be considered for development.^[97] REV later released as a DeepVocal voicebank on May 24, 2021, with HirotoP voicing him. He is being considered for a commercial voicebank depending on his popularity, and should it happen, a proper voice actor or singer would be assigned to him.^[98]

On June 3, 2022, ROSA tweeted that she and WhiteCUL would be performing at the 柚子花主催LIVE -Planet Station- STAGE.3 online concert on June 19, however, WhiteCUL's character design would not be shown.^{[99][100][101]} On the day of the concert, it was later clarified that the singing voices for ROSA and WhiteCUL were performed by their voice providers rather than using singing voice synthesizers. HirotoP hoped that the performances would give listeners an idea of what an AI singing voice database would sound like. It was then unknown if WhiteCUL would be receiving a singing voicebank as, at the time, only ROSA was confirmed to be receiving a Synthesizer V AI voice database.^[102]

On July 25, 2023, HirotoP tweeted information regarding CUL and her future developments noting that she would be renewed at a later point in time. She was announced to be receiving a new design and would likely be referred to as RE:CUL or REDCUL, however the project would be a long ways off. As CUL's voice was provided by famous voice actress Eri Kitamura, HirotoP noted that it would be difficult to ask her to return as CUL's voice provider due to her busy schedule. As a result he made a suggestion of holding an audition to seek out a new fitting provider for CUL's new image. It was noted that the production of CUL would not begin until after ROSA and WhiteCUL's productions have completed.^[103] Following the announcement of ROSA's Synthesizer V crowdfunding campaign to begin in mid-November (later postponed to at least two months later), the official CUL Twitter account excitedly asked fans to support ROSA while also stating that after ROSA and WhiteCUL's developments, that it would be her turn next, hinting at the possibility of CUL being in consideration for a voice database, depending on how successful ROSA and WhiteCUL perform.^[104]

On May 20, 2024, WhiteCUL announced a crowdfunding campaign for an AI singing voicebank for VOCALOID6,^[105] which started on May 24.^[106] When asked earlier about whether she would be too made for Synthesizer V AI, WhiteCUL limited her response to just saying that, if this crowdfund were highly successful, then ZAN-SHIN would hopefully be able to develop various software products, including for Synthesizer V.^[107]

On May 27, 2021, Ddickky gave on Bilibili an explanation for the origin of the name Quaid (奎德) as applied to the upcoming MEDIUM⁵ 2050 game's big villain boss: originally, after considering Quadimension's full English name to be too long (due to the English part being "not conducive to dissemination"), he wanted to enable "Quad" both as an abbreviation for Quadimension and as the name of the game's protagonist, but then feeling that the Chinese transliteration of "Quaid" at that time "didn't sound like a good guy's name", he chose to reuse it instead for the villain.^[108]

Later on October 2, Rui'an Ryan, one of Quadimension's tuners,^[109] published on Bilibili a status where he mused about national holidays being good days for working on tunings while also complaining about having a "queue of hobby to-dos" before him after finishing business tunings: "I used to be a person who would want to learn to sing whenever I heard a song I liked, but now when I listen to it, I only think about who" (the vocal) "would be more suitable for tuning it. As a result, there's always new to-dos entering my desk, (and thus) I can never get finished with my backlogs."^[110] There, he attached an almost-completely-censored screenshot of some lengthy memo of "candid songs", with its title and headings being the only readable lines there: the bottom-most headings were the names of all Quadimension vocals (including Xingchen), Eleanor Forte, and an "English Male" (Dreamtonics' then-unnamed vocal who would later become Kevin), but also the name Quaid was inserted between Minus (given there as 减减, Jiǎnjiǎn) and Muxin,^[111] leading some Weibo users one day later to speculate whether there was more information or updates on Quaid (as a potential voice), "otherwise how can Ryan judge whether Quaid is suitable for singing?"^[112] There is, however, no explicit mention of any (private or beta) voice library for Quaid, nor any mention of a vocal-synth engine for it.

On April 19, 2022, TOKYO6 ENTERTAINMENT introduced a fourth character known as Momoka Akino (百花秋乃), who was Natsuki Karin's senior and was themed around the autumn season.^[113] She made her debut in Karin's audio drama and was voiced by Nene Hieda, who won the Rookie of the Year award at the Voice Actor Awards in 2022, prompting the company to contact her.^[114] There was an offer with an idea of making a voice synthesized character in the future, however, TOKYO6 ENTERTAINMENT wanted to think further about the development of the three existing cast members (Koharu Rikka, Natsuki Karin, and Hanakuma Chifuyu) at the moment, thus putting the idea aside.^[115]

On May 31, 2022, after XIA YU YAO's AI voice library production crowdfund launched, a fan asked if there would be AI voice libraries for the other VOICEMITH voice synthesizer characters: OSCAR, JOAN, and ZETA. The company replied "Possibly but not this year".^[116] Some time after the release of YU YAO's Synthesizer V AI library in January 2023, VOICEMITH's website was modified to no longer include the other voice synthesizer characters. There was no announcement regarding the change to the website nor was a reason provided.^[117] In April, OSCAR was confirmed to be planned for Synthesizer V AI;^[118] after a successful crowdfund, he was released on December 26.^[119]

On March 5, 2024 (VOICEMITH's 10th anniversary), Juxer's Twitter account announced VOICEMITH's incursion into ACE Studio with a poster titled "Original Classic" showing six characters: YU YAO, OSCAR, JOAN, ZETA, and two then-unknown characters.^[120]

On March 11, 2023, in response to some fans' questions regarding the production of AI voice databases, Ddickky said that the other "AI" voice databases were promoted with Xingchen Infinity and that the voice providers were invited at the same time in the prior year. He said that he had no issue with the funding, but that some of the voice providers were concerned that the AI would be "stealing their jobs" while some were procrastinating with the work until recently. There was also a concern that the databases would not sound like the previous R1 and R2 "Standard" versions. The commercialization would be determined after the production was completed, but it was expected to be handled similarly to Xingchen Infinity and would be sold directly since the technical workload and input cost were completely different. If there were no issues or delays, Chiyu and Minus were expected for 2023, though the other vocalists have not been mentioned.^[48][49][50]

During December 1, 2023's AH-Software livestream, where it was announced that both miki and Hiyama Kiyoteru (two of the company's three debut vocals for VOCALOID in December 2009) would be receiving AI voice databases for Synthesizer V Studio (originally for their joint 15th anniversary in 2024,^[121] but ultimately delayed^[122] and released instead on March 21, 2025 as Synthesizer V 2 AI voice databases),^[123][124] it was noted that, with regards to Kaai Yuki (AHS's third debut VOCALOID), it would be very difficult to record a new voice library for her (due to the fact that her original voice provider, who back then in 2009 was a child and as of today still remains unrevealed for legal reasons, is now an adult and her voice quality has changed), and as for using her existing VOCALOID4 voicebank to derive a new voice database (whether it would be a new Standard voice database based on her existing raw samples or a Synthesizer V Plus-style AI voice database trained from songs performed by her V4 Natural voicebank was not mentioned, though), they would still have to first consult with Yamaha Corporation before carrying it out.^[125]

On March 28, 2019, Ddickky posted on Weibo that two Xingchen voice databases were being planned for Synthesizer V. These voice databases were labelled as "Xingchen/ZERO English" and "Xingchen/ZERO Chinese", as the character would be determined based on the differences between the new voice databases and Xingchen's original VOCALOID voicebank. If the differences were too great, the voice databases would be known as ZERO rather than Xingchen.^[126]

On August 25, 2021, Xingchen Infinity was announced to be in production for Synthesizer V AI, though information about ZERO was not mentioned. Due to Xingchen's production launch for Synthesizer V, it may be possible that ZERO may not receive a voice database for the software.

Eleanor was confirmed to be updating to Synthesizer V Studio. While a Lite version was released on July 30, 2020, a full release was not yet made available. On October 30, 2020, in response to a fan's tweet regarding the update, VOLOR stated there would be a compromise of the schedule due to attempting to fully utilize the cutting edge technology for Synthesizer V.^[127]

On May 11, 2021, VOLOR noted that plans were set back due to the COVID-19 pandemic. They also noted that there was an interest in making an AI edition for Eleanor, but noted that she may sound very different compared to her original Synthesizer V release, while a Standard voice database would sound more faithful. Though a full Standard voice database is still being planned, it may take years to develop.^[128] Eleanor's AI voice database was eventually released several months later on December 6, 2021.

However, there have been no new Standard voice databases released since Kyomachi Seika, and Synthesizer V Studio 2 does not support Standard voice databases.

On August 1, 2021, VirVox Project announced that a crowdfund campaign for GENBU's AI voice database would be launched in Mid-August.^[129] Due to discrepancies, the crowdfund for his AI voice database was canceled.^[130] Continued production of GENBU's AI voice database is unknown. On December 24, 2022, VirVox Project confirmed that they were not giving up on creating AI singing voice databases. The goal for 2023 was to implement AI singing voice synthesis, but it was noted that this was premature and that the production process may have obstacles. Specific characters and voice synthesis engine were not specified at the time.^[131]

On February 27, 2023, Dreamtonics posted a poem on bilibili along with an announcement that new songs and other news were expected for February 28 at 17:00 GMT+8.^[132][133] Details were not specified but the first part of the poem seemed to describe the beauty of song and pronunciation in music across any language.^[134][135] The second part described the role of melodies and pitches in music, emphasizing the importance of rhythm.^[136][137] On February 28, a technical demo announcing the future support for the Cantonese dialect and rap was uploaded, showing a new male AI voice database singing in the new supported language respectively. The new male vocal was confirmed to be entirely trained on Cantonese songs and was noted to be the first Cantonese voice library in the history of commercial singing voice synthesis software.^[138] On March 15, after receiving feedback in improving the song to be more in line with Cantonese songwriting habits, Dreamtonics replaced the bilibili version of the debut video, which implemented corrections made to the male vocal's and Feng Yi's demos.^[139][140]

On September 26, Dreamtonics announced that they would be showcasing a "soon-to-be-released" dedicated Cantonese Chinese AI voice database (who on a later date was named Wei Shu) at the Music China event in Shanghai, which ran from October 11 to 14. This vocal was noted to have outstanding mixed Mandarin and Cantonese singing with proficient and smooth Cross-lingual Singing Synthesis across the four available languages for Synthesizer V Studio.^[141] It is currently unknown if this voice database was the same one shown in February or if it's a new vocalist.

On December 14, 2023, when asked by an anonymous user regarding SAROS's license mentioning a Lite version, Eclipsed Sounds responded that, like SOLARIA and ASTERIAN before, SAROS would have a Lite voice database sometime after their next project in 2024.^[142]

No further news have been announced regarding SAROS Lite since then, and with the imminent release of Synthesizer V Studio 2 and SAROS II, it is unknown if SAROS Lite will ever be released.

On March 28, 2019, Ddickky posted on weibo that two Xingchen voice databases were being planned for Synthesizer V. These voice databases were labelled as "Xingchen/ZERO English" and "Xingchen/ZERO Chinese", as the character would be determined based on the differences between the new voice databases and Xingchen's original VOCALOID voicebank. If the differences were too great, the voice databases would be known as ZERO rather than Xingchen.^[126]

Xingchen Infinity was later announced on August 25, 2021. This was planned to be a Synthesizer V AI voice database. It is currently unknown if the English voice database would still be produced, especially since Cross-lingual Singing Synthesis (introduced since Synthesizer V Studio Pro 1.5.0) allows AI voice databases to sing in all officially-supported languages regardless of the language of the singing data that the voice database was originally recorded in. In addition, Xingchen Infinity had additional Japanese and English recordings to enhance her capabilities in those languages through the function.

On August 24, 2022, VOICEMITH officially announced XIA YU YAO to be in production for Synthesizer V AI. Her full version was released on January 30, 2023 as physical and digital copies. A Lite version was planned to be in production.^[143] In response to a fan on February 23, 2023. VOICEMITH stated that the Lite version of XIA YU YAO would not be released. No additional information was provided.^[144]

On May 17, 2021, Yuuma, a Japanese Virtual YouTuber, tweeted that Kemonone Row and Shiki Taigen were expected to have commercial voicebanks developed on a software that would support English input. It was noted that the English voicebanks would be based on Japanese pronunciation.^[145] The platform was not confirmed at the time.^[146] In regards to Row's name, Yuuma noted that he wasn't sure which would be better for a person's name as he didn't know enough English to make a decision, leaving this to fans to give suggestions.^[147] This later led to Yuuma tweeting that the name would be changed to "Rowen Shiki", Row's real name, after the development of a commercial voicebank was decided. It would serve to unify with the family name "Shiki", which was the same as Shiki Taigen, Row's great-grandfather.^[148]

Later on July 5, Yuuma expressed interest in creating a Synthesizer V AI database for Rowen, though a crowdfund would be necessary to produce it.^[149] He later asked overseas fans on July 7 if Rowen's voicebank should be on Synthesizer V, and if so, a Standard voice database was considered due to budget.^[150] Synthesizer V was not a final decision, but it was confirmed to still be a consideration. A decision on crowdfunding would be dependent on support and encouragement from fans.^[151] The estimated budget would be based on previous successful Synthesizer V crowdfunds.^[152]

On July 26, 2022, Yuuma announced that Shiki Rowen was now being recorded for an AI singing voicebank^[153] which would be first released for free on the NNSVS engine.^[154] In response to inquiries by fans, he said that Synthesizer V was no longer in consideration^[155][156] but that other commercial platforms were being considered;^[157] budgetary reasons (allocating everything for A.I.VOICE and blanking out AI singing synthesis) were cited for the dismissal of Synthesizer V as a platform for Rowen.^[158][159] Instead, Rowen was later developed for the VOCALOID6 engine^[160][161] and released by Yamaha Corporation on April 24, 2024.^[162][163]