Overview
RIME (裏命) is the third voice synthesis software in KAMITSUBAKI STUDIO’s “Musical Isotope” (音楽的同位体) series. It is built using AI technology based on the vocal data of virtual singer RIM (理芽) to generate highly realistic singing voices.
Running on the CeVIO AI platform, the name “RIME” is derived from the concept of “RIM + ECHO”. She inherits the combination of transparency and mysterious vibes from RIM’s voice, while exhibiting powerful emotional expression.
Character and Creative Positioning
Designed by PALOW., RIME’s visual features include white hair with deep blue highlights and an eight-pointed star hair accessory, giving her a cool and cybernetic look. In terms of vocal performance, RIME is equipped with realistic breathing sounds and delicate vocal control, allowing her to deliver strong emotional resonance across fast-paced electronic, rock, or slow ballad genres.
As a member of the Musical Isotope series, she is positioned as a “creative partner” for creators. Within the UGC (User Generated Content) ecosystem, many creators have used RIME to publish a vast collection of diverse derivative works.
Basic Profile and Character Setting
RIME is a CeVIO AI singing-synthesis product and character based on RIM’s vocal data. It preserves the transparency and strangeness associated with the source voice while remaining an independent creative identity.
| Item | Detail |
|---|---|
| Voice source | RIM |
| Platform | CeVIO AI and VOICEPEAK TALK EXTENSION |
| Character design | PALOW. |
| Main projects | Paranormal, RIME song contest |
Activity History
2022
- April 16: RIME’s existence was first revealed in a teaser video during the end credits of V.W.P’s 1st ONE-MAN LIVE “Phenomenon” (現象).
- July 7: Pre-orders for CeVIO AI RIME officially began, and the music video for her first cover song, “Carnivorous Plant” (食虫植物) (originally by Kaf), was released on YouTube.
- July 14: The first original song “Mandarin” (マンダリン), composed by R Sound Design, was released.
- September 30: RIM released the duet version of her song, “NEUROMANCE feat. RIME (from Singularity Live)”.
- October 25: “CeVIO AI Musical Isotope RIME” was officially released, and character designer PALOW. revealed the official character illustration.
- December 5: The RIME Illustration, Song, and MV Contest was launched.
2023
- April 4: Announced the release of RIME’s 1st compilation album “Paranormal” (パラノーマル), featuring 39 original tracks by various UGC creators.
- May 10: The first volume of the compilation album, “Zankyou no Paranormal” (残響のパラノーマル), was released digitally.
- May 24: The second volume of the compilation album, “Tamayura no Paranormal” (玉響のパラノーマル), was released digitally.
- June 7: The third volume of the compilation album, “Koukyou no Paranormal” (交響のパラノーマル), was released digitally, alongside the release of the physical CD box set.
- September 13: The fourth volume of the compilation album, “Kuusou no Paranormal” (空想のパラノーマル), was released digitally.
- November 22: Released the music video for the song contest grand prize winner, “Hana Fururu” (花降るる) composed by haruna..
- December 16: Announced the development of the speech synthesis software “Musical Isotope RIME TALK EXTENSION collaboration with VOICEPEAK”, with pre-orders beginning on December 18.
2024
- February 26: “Musical Isotope RIME TALK EXTENSION collaboration with VOICEPEAK” was officially released.
- July 7: As a member of the isotope group “V.I.P”, RIME performed at the 3rd-anniversary commemorative virtual mini-live “V.I.P 1st MINI LIVE ETHEREAL WORLD”.
- August 8: As a member of “V.I.P”, RIME performed at “KAMITSUBAKI FES ‘24 THE DAY THE EARTH STOOD STILL” held at Pacifico Yokohama.
2025
- November 2: As a member of “V.I.P”, RIME performed at “KAMITSUBAKI FES ‘25 OUR ONE-DAY WAR” held at Kanadevia Hall.
Representative Works and Related Entries
Expand full albums and EPs
Albums & EPs
| Release date | Type | Title |
|---|---|---|
| 2025-01-11 | Album | 5: I Wish I Could Figure Out Why I Can Dream |
| 2025-01-16 | Album | Only pitch-blackness can save you. |
| 2025-03-15 | Album | Adore |
| 2025-04-26 | EP | Newgame |
Expand full singles list
Singles
| Release date | Title |
|---|---|
| 2015-05-14 | Doubt |
| 2015-10-11 | 爆発反転 (feat. マサラダ) |
| 2015-10-11 | EXAM (feat. Rime) |
| 2016-01-28 | Everything |
| 2017-07-25 | 怪獣は猫が好きなんだ |
| 2023-03-20 | 文明と呼吸 |
| 2023-04-13 | PHNTM |
| 2023-05-27 | マタドール |
| 2023-06-02 | けだもの |
| 2023-07-17 | 亜ガキ |
| 2023-07-26 | ヨークシャンデレラ |
| 2023-08-13 | レセダ |
| 2023-08-19 | ぜんぶどうでも |
| 2023-09-06 | 半直線のうた |
| 2023-09-06 | バンビ |
| 2023-12-04 | 夜のワルツ |
| 2023-12-22 | ぎゅっとして |
| 2024-01-31 | やさしい嘘 |
| 2024-06-25 | 真夜中はいつも一人 |
| 2024-08-25 | 美しいもの |
| 2024-08-31 | 微睡む夏 |
| 2024-10-16 | 多角的に見た自己犠牲、または愛と呼ばれる行動についての考察 |
| 2024-10-22 | 大作戦です。 |
| 2024-10-29 | 否・アンチドート |
| 2024-10-29 | 哀しき玩具 |
| 2025-02-28 | eden-404 |
| 2025-03-22 | 赤い目に君は気づかない |
| 2025-05-01 | アイニーク |
| 2025-07-16 | 花に笑う |
| 2025-07-18 | cheers |
| 2025-07-23 | 秘めた想い (2025ver.) |
| 2025-07-29 | stargazer |
| 2025-08-04 | 溶けきれない背景 |
| 2025-09-07 | 降り立つ今日は、 |
| 2025-09-09 | God Gacha |
| 2025-09-16 | ことばたらず |
| 2025-10-10 | 君と息をしていたかった |
| 2025-10-13 | unnamed |
| 2025-11-08 | White Noise |
| 2025-11-20 | ごめんね、いい子じゃなくて |
| 2025-11-21 | LOSER |
| 2025-12-20 | ラストエンプティサテライト |
| 2026-01-28 | 幽玄の詩 (feat. ◈*ゆくえわっと) |
| 2026-03-29 | 現象ラブ・ソング |
| 2026-04-15 | TIMEOVER |
| 2026-07-30 | レイニー・レメディ (feat. Rime) |
Representative Songs and Creator Ecosystem
“Insect Plant” is an official demonstration cover connecting RIM’s catalogue to RIME, while “Mandarin” demonstrates RIME as an independent synthetic singer. The Paranormal compilation series gathers UGC works into a formal release history, and the RIME song contest extends the ecosystem to original songs and music videos.
When cataloguing a work, distinguish RIM’s performance, a RIME performance, and a duet between RIM and RIME. TALK EXTENSION expands the project from singing into speech expression.
Official Music and Community Works
RIME’s history differs from that of a conventional solo artist: demonstrations, contests, and creator compilations are the primary milestones. The Paranormal releases should therefore be read as a creator-community archive as well as a music release series.
Official Compilations and Naming System
Built from RIM’s voice and inheriting her husky texture and urban-pop sensibility, it represents the “urban / bilingual” strand.
| Item | Detail |
|---|---|
| First compilation | RIM+YOU RIME COMPILATION ALBUM Paradox (2023-01-25) |
| Naming | Follows the formula “source-witch code + YOU”, meaning “RIM and you” |
| Voice template | RIM |
| Release system | KAMITSUBAKI STUDIO Musical Isotope series |
What the naming means: titling the official compilations “X+YOU” redefines the Isotope from a “tool” into “a partner who creates alongside the listener”. Every track on the compilations comes from an invited or selected creator, making them a direct intersection of the official and community creative ecosystems.
Acoustic Engines and Library Specifications
The Musical Isotope project is built on a dual-engine acoustic architecture, each engine serving a different purpose.
| Engine | Developer | Technical character |
|---|---|---|
| CeVIO AI | Techno-Speech | Evolved from a hybrid of HMM and deep neural networks (DNN), it captures vibrato, breath and vocal-fold micro-noise — the “imperfect but alive” detail of a real singer — to an extreme degree |
| Synthesizer V AI | Dreamtonics (5th generation) | A fully autoregressive acoustic model with cross-lingual singing (natural Japanese/English/Chinese transitions), seamless morphing of emotion parameters (Power / Soft / Clear), and very high render speed and editability |
Why both: CeVIO AI preserves human imperfection; Synthesizer V AI handles cross-lingual work and deep editability. Together they cover everything from reproducing a live vocal texture to giving global creators full creative latitude.
Open Licensing and the Derivative-Work Ecosystem
For the Musical Isotope project KAMITSUBAKI abandoned the closed restrictions of conventional artist management and built an open, self-reinforcing licensing loop.
- A commercial-use threshold instead of a ban: doujin musicians may freely use the voice libraries within a defined revenue ceiling and release the resulting originals straight to streaming platforms.
- Official compilations that absorb the scene: through open calls for official compilation albums, outstanding community creators and works are brought onto major releases, creating a cycle of “community creation → official validation → wider reach”.
- Results: this mechanism produced phenomenon-level UGC hits such as “キュートなカノジョ” and “フォニイ”, carrying AI singing into the centre of mainstream pop culture.
Industry significance: where the traditional record system restricts derivative works, KAMITSUBAKI treats a voice library as a gateway into an ecosystem rather than a closed asset — the fundamental reason the Isotope family accumulated such a vast body of UGC within a few years.
Related Projects / Setting
RIME is a core member of the “Musical Isotope Project” initiated by KAMITSUBAKI STUDIO. Using virtual singers’ vocal data to create synthesis software, this project allows RIM’s voice to transcend standard vocal performances and become a versatile musical material for creators to restructure infinitely.
Relationship to the Source Witch
| Item | Detail |
|---|---|
| Voice template | RIM |
| System | One node of the five-witch isotope matrix of V.W.P |
| First release | CeVIO AI (a Synthesizer V AI edition followed) |
| Position in the lore | The digital-side counterpart of KAMITSUBAKI’s “song singularity”, sharing one source of “singing voice” with RIM |
Naming rule: each Isotope’s official name is drawn directly from its source witch (KAFU←KAF, RIME←RIM, SEKAI←ISEKAIJOUCHO, COKO←KOKO, HARU←HARUSARUHI). The convention itself declares the core idea: different forms of one existence.
