Terms of Use — Amitaro’s Voice Material Studio

These materials are NOT public domain, CC0, or “do whatever you want” free
assets. All use is subject to the terms below. Please read carefully before
using.

If you can read Japanese, please refer to the Japanese terms of use.

日本語が読める方は、必ず日本語版の利用規約をご参照ください。

Amitaro’s Voice Material Studio provides free voice materials to support
creators of all kinds. All materials are intended for wholesome, all-ages use,
and these terms are designed to keep them that way.

What These Terms Cover

These terms apply to all audio materials and models freely distributed by
Amitaro’s Voice Material Studio.

If you are using these materials through an external service, please also refer
to that service’s terms of use.

What Is Permitted

The following uses are permitted:

• Personal and commercial use, including monetization
• Use for any purpose — games, videos, apps, software, research, and more
• Editing, trimming, pitch-shifting, and other audio modifications
• Using the voice as a character voice for original characters, game characters,
  virtual avatars, and similar creative works
• Using as training data to create your own AI or voice synthesis models
  (see AI Voice Models)
• Integrating into software or games, where voice files cannot be independently
  extracted by end users

Credit is required. See Credit Requirements below.

What Is Prohibited

Distribution

• Redistributing, reselling, or sharing voice files as a standalone collection,
  whether free or paid
• Bundling voice files in any format where end users can independently extract
  or download them
• Distributing or sharing AI voice models created from these materials
• Copying the voice clip script text to record and distribute in another voice

Content

• Any content not appropriate for children (sexually explicit content, adult
  themes, etc.)
• Works where grotesque or violent content is the primary focus
• Hate speech, harassment, or content that discriminates against individuals
  or groups
• Political or religious activity
• Advertising for gambling, alcohol, drugs, or weapons

Deceptive or harmful use

• Fraud, deception, or any use intended to deceive others
• Deepfake audio — making it appear a real person said something they did not say
• Automated voice fraud (vishing), robocall scams, or similar deceptive automated
  calls
• Using the voice as if it were your own natural voice

Rights and registration

• Registering raw voice materials or recordings in YouTube Content ID or any
  equivalent rights-claiming system
• NFT projects, blockchain-based assets, or cryptocurrency projects involving
  these materials
• Submitting works to competitions or contests where copyright transfers to the
  organizer upon submission
• Direct linking (hotlinking) to audio files hosted on Amitaro’s servers
• Using the names “Amitaro,” “Koharune Ami,” or “Amitaro’s Voice Material Studio”
  to imply that a work is officially endorsed or created by Amitaro

Credit Requirements

Credit is mandatory. You must include “Amitaro’s Voice Material Studio
(https://amitaro.net/)” or “Koharune Ami” in a clearly visible location.

If a clickable link is not possible (video, print, etc.), a plain-text URL is
acceptable.

In environments where text credit cannot be included (VRChat, voice chat, etc.):
written credit may be omitted. However, if anyone asks about the voice, you must
clearly state that you are using voice materials from Amitaro’s Voice Material
Studio. Do not claim it is your natural voice.

Age & Content Restrictions

All uses must be appropriate for children of all ages, regardless of official
age ratings.

Sexually explicit content is strictly prohibited. There are no exceptions.

Violence that is not the primary focus of a work — such as combat sounds in a
game — is permitted. Works where grotesque or violent content is the primary
focus are not permitted.

AI Voice Models

Training on these materials to create your own AI or voice synthesis models
is permitted. All content restrictions above apply.

Official models distributed by Amitaro’s Voice Material Studio may not be
redistributed or resold.

Distributing or sharing any AI voice model, RVC model, or voice synthesis model
created from these materials is prohibited.

If using a self-trained model as a personal voice changer:

• Credit is required
• Do not use the names “Amitaro,” “Koharune Ami,” or “Amitaro’s Voice Material
  Studio,” or any name that could be associated with them, for the model or its
  output. This is to prevent confusion with official releases and statements by
  Amitaro’s Voice Material Studio.

For academic research use, contact Amitaro in Japanese.

Recording Environment

A-weighted SPL: 18.5 dB
(Rion, NL-52EX)
Reverberation Time (T60): 220 ms

Note: T60 is estimated based on the method in [1]. The impulse response is introduced by Time-stretched pulse (TSP) [2].
Sampling frequency is 48 kHz, and quantization bit is 24 bit.
The duration of TSP is 524288 sample (10.92 s).

References
[1] M. R. Schroeder，”A new method of measuring reverberation time”，J. Acoust. Soc. Am.，vol. 37，pp 409−412，1965.
[2] N. Aoshima，”Computer-generated pulse signal applied for sound measurement”，J. Acoust. Soc. Am.，No. 69，vol. 5，1981.

Contact & Inquiries

→ FAQ: https://amitaro.net/voice/terms/faq_en/

All inquiries must be submitted in Japanese. Inquiries in English or other
languages will not receive a response.

Lack of response does not constitute approval, permission, or acknowledgment
of any use not already permitted by these terms.

Governing Law & Disclaimer

These terms are governed by the laws of Japan.

These materials are provided “as is,” without warranty of any kind. Use is at
the user’s own risk.

Use of these materials does not imply endorsement or approval by Amitaro’s Voice
Material Studio of any work, product, or creator.

Please also comply with the laws of your region and the terms of any platform
where you publish.

If a violation of these terms is confirmed, we may request that you discontinue
use.

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