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Kasukabe Tsumugi VX-β VOICEVOX | Songs Albums Notable Originals

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


On September 14, 2023, four partial illustrations were teased on the official VOCALOID β-STUDIO Twitter account with the announcement of four new singers.[1] While unconfirmed by name at the time, the illustrations closely matched previously created characters, primarily those who have appeared as Virtual YouTubers including: And Uge, Kanade Kanon, Kasukabe Tsumugi (a character released originally for the VOICEVOX text-to-speech synthesizer, who was created and voiced by Kasukabe Tsukushi), and Ci the Jiangshi (a former member of the Japanese Virtual YouTuber duo unit BOOGEY VOXX).[2][3] The last vocalist to be revealed was Kasukabe Tsumugi β, a Japanese VOCALOID based on the voice of the Virtual YouTuber Kasukabe Tsukushi, announced officially on September 20, 2023. She made her official debut on September 22 along with her first demonstration, the same day an update for VX-β was announced.[4][5]

Kasukabe Tsumugi β was announced to be released for beta testing applicants beginning on September 26, 2023 to coincide with the VX-β Ver1.1 update. Additional demonstrations were added to her official product page on the official VOCALOID β-STUDIO website the same day.[6][7]

Usable Period[]

VX-β and included voicebanks, such as Kasukabe Tsumugi β, had a limited usable period. After March 31, 2024, the activity end date of this project, it will not start as a plug-in and cannot be used. It was encouraged that users save important work that was being worked on by exporting them onto their respective DAW software until then.

Product Information[]



君の推し! (Kimi no Oshi!) YouTube
demo1 vocaloid.beta.yamaha.com
demo2 (shared chorus ver.) vocaloid.beta.yamaha.com
demo3 (shared solo ver.) vocaloid.beta.yamaha.com

System Requirements[]

  • OS: Windows 10, Windows 11, macOS 13 Ventura
  • CPU: Haswell (4th generation) or later Intel Core series or Xeon series; Apple Silicon
  • RAM: 8 GB minimum recommended
  • HDD: At least 1 GB or more (including all voicebanks)
  • Graphic Minimum Open GL 3.2 or higher
  • Other: Audio device, internet connection (for authentication, deauthentication, software updates, etc.)
  • Monitor size:
    • Minimum operating environment: 1024×768 or higher resolution


Product Information
  Trial/Demo Vers?: TBA  Starter Available?: TBA  App vers.?: TBA
Package details as noted:

A feminine AI voicebank capable of Japanese singing voice synthesis.

Vocal traits as noted:

Kasukabe Tsumugi β was described as having "a bright and gentle voice echoing from Saitama."

Voicebank sample

Kasukabe Tsumugi β
File:Kasukabe Tsumugi β Solfege.ogg