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Gekiyaku VX-β VOCALOID6 UTAU | 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 August 19, 2023, two partial silhouettes were teased on the official VOCALOID β-STUDIO Twitter account.[1] At the time, it was unknown if they were two different characters or the same character with two separate designs. It was also unknown if these silhouettes were involved with an existing voice synthesis character or were completely new.

On August 22, 2023, Gekiyakuβ was unveiled as one of the first AI voicebanks to be released for VOCALOID β-STUDIO as a part of the VX-β DAW plugin. Gekiyakuβ was a Japanese female VOCALOID described as having a strong and simple girl's voice.[2] Yamaha Corporation began accepting applications for participation in the VOCALOID β-STUDIO campaign and encouraged the creation of new music using the VX-β application. It was noted that in the future, Yamaha would recruit new applicants irregularly, and in addition to those who have won the lottery, the winning applicants who have been selected based on the answers to the questionnaire would receive the VX-β DAW plug-in, which uses singing voice synthesis technology that was still in the research stage, and would be distributed free of charge.[3][4] Music created using VX-β was subject to the individual character terms of use of each voicebank.[5] Users could freely publish within the scope of the terms. A total of 9 voicebanks were announced for beta testing of the software including: prtv_0, prtv_1, prtv_2, prtv_3, Gazenβ, nagiβ, multiβ-N (which included an additional seventeen individual voicebanks within the main multiβ-N voicebank package), Gekiyakuβ and Kazehikiβ.

Beginning August 23, the first round of recruitment began, and winning applicants were presented with a download and serial codes for the VX-β plugin and the included nine voicebanks. Those who were not selected at the time would automatically be enrolled for the next recruitment.[6]

Usable Period[]

VX-β and included voicebanks, such as Gekiyakuβ, 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[]



demo1 vocaloid.beta.yamaha.com
demo2 vocaloid.beta.yamaha.com
demo3 (shared chorus ver.) vocaloid.beta.yamaha.com
demo4 (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:

Gekiyakuβ was described as having "a strong and simple girl's voice."

Voicebank sample

File:Gekiyakuβ Solfege.ogg