What is CeVIO AI? A detailed explanation of the features, usage, and commercial use of voice synthesis software
June 30, 2025


CeVIO AI is a singing voice synthesis and voice synthesis software that utilizes AI technology.
A major feature of CeVIO AI is that it supports both singing voice synthesis and voice synthesis.
It is possible for popular characters such as "Sato Sasara" and "Suzuki Tsuzumi" to read and sing , making it suitable for music and video production.
In this article,
- Those who want to try using CeVIO
- Looking for a way to read text aloud?
To that end, we will provide a detailed explanation of all the information you need to get started using CeVIO AI, from its features to specific ways to use it, points to note when using it for commercial purposes, and recommended text-to-speech methods.
Please use this article as a reference to find the perfect text-to-speech software and reading method.
[Free and commercial use OK] Easy-to-use, state-of-the-art AI text-to-speech service
If you are looking for a service that can read text aloud using the latest AI, we recommend "Ondoku."
"Ondoku" is a free text-to-speech service.
You can have 1,000 characters read aloud for free without registering, or 5,000 characters if you register your email address!
What's more, it's free and can be used for commercial purposes (credit is required for the free plan) .
"Ondoku" can be used immediately without installation !
You can create audio immediately by simply opening the top page, so even beginners can use it with confidence.
It can be used not only on Windows, but also on Mac and Linux, which CeVIO does not support!
You can easily synthesize video narration and in-store announcements with voices that are suitable for a wide range of situations, from business use to hobby use, including male, female, and child voices .
Why not try using "Ondoku" to create easy-to-listen-to, realistic audio using the latest AI for free?
What is CeVIO AI? Explaining professional singing voice synthesis and voice synthesis software
First, let me explain the features of CeVIO AI.
CeVIO AI is a voice synthesis software that uses AI technology.
CeVIO AI is a voice synthesis software that uses AI technology developed by TechnoSpeech Co., Ltd.
High-quality voice synthesis is possible using the voices of popular characters such as Sato Sasara and Suzuki Tsuzumi.
It is characterized by its ability to generate high-quality audio that is also used in professional production environments, and can be used for professional video and music production.
CeVIO AI is paid software , so you need to purchase it for each character.
This is a recommended option for those who want a professional voice synthesis software and don't mind the cost.
CeVIO AI supports both voice synthesis and singing voice synthesis
The biggest feature of CeVIO AI is that it supports both voice synthesis and singing voice synthesis .
You can create both talk and music with one software, so you can seamlessly weave conversation and song into your videos.
CeVIO AI uses AI voice synthesis technology to produce natural, human-like speech.
Unlike previous mechanical text-to-speech software, it can generate expressive voices that are unique to AI.
Emotion expression function allows you to finely adjust emotions such as joy, anger, sadness and happiness.
Each character has multiple emotion parameters, allowing you to choose the most appropriate emotion expression depending on the content.
Differences between CeVIO Project products and third-party products
CeVIO AI has two main product categories :
- CeVIO project products
- Third Party Products
is.
CeVIO Project products are products officially developed and sold by the CeVIO Project.
The voices of original characters from the CeVIO project, such as Sato Sasara, Suzuki Tsuzumi, and Takahashi , are featured.
On the other hand, third-party products are products developed by other companies using the CeVIO AI engine.
This site also features many characters that are widely used in YouTube videos , such as Koharu Rikka, Kafu, and Zundamon.
Both use the same CeVIO AI engine, but have different licensing systems and terms of use.
Each company has its own purchasing methods and support systems, so you need to be careful when choosing a product.
Since the engine is the same, there are no major differences in sound quality or basic functions, but there are differences in the character personalities, voice qualities, and functions offered.
Official character of CeVIO Project products
CeVIO Project products have three official characters.
Sato Sasara: CeVIO's first female character
Sato Sasara is CeVIO's first character.
It supports both talk voice and song voice, and is characterized by a female voice that is rich in emotional expression .
With a bright and friendly voice quality, it can be applied to a wide range of content.
The CeVIO AI version was released in August 2021, with voice actress Sato Satomi providing the audio.
Suzuki Tsuzumi: A female character with a calm voice
Suzuki Tsuzumi is the second character in the CeVIO project.
It supports both talk voice and song voice, and has an attractive, calm, female voice.
Her voice is a perfect counterpart to Sato Sasara's bright voice, and is perfect for expressing a quiet and elegant atmosphere .
The CeVIO AI version will be released in September 2022, with voice actor Hiyori Kono in charge.
Takahashi: CeVIO's only male character
Takahashi is the only male character in the CeVIO project.
Only talk voice is supported, no song function is provided.
It features a calm, masculine voice that can be used in a wide range of situations, from cheerful voices to business use.
The CeVIO AI version was released in August 2023.
A wide range of third-party products
CeVIO also has a wide variety of characters in its third-party products.
Many popular characters in the voice synthesis world are participating, including Koharu Rikka, Tohoku Kiritan, Yuzuki Yukari, Kafu, and Zundamon .
There are many collaboration characters with the anime and game industries, and the series is supported by a wide range of fans.
Due to the unique character settings of each development company, there are characters with a wide variety of voice qualities and personalities.
You can choose characters with more specialized abilities depending on your needs.
However, please be aware that each character may have restrictions on commercial use, etc.
Considerations when selecting a product
When choosing a CeVIO AI product, it is important to first clarify its intended use .
Your options will be narrowed down depending on whether you only need the talk function or whether you also need the song function.
Preferences in voice quality are also an important factor, and differences between men and women, age groups, and character personalities must be taken into consideration.
It is also important to check the terms of use and license system, especially if you plan to use it for commercial purposes.
The terms of use for CeVIO Project products and third-party products differ significantly, so we recommend that you check them in advance before purchasing.
CeVIO license and terms of use notes
When using CeVIO AI, you need to pay attention to the license, whether you are using it for commercial or non-commercial purposes.
The first thing you should pay attention to is the credits for the software name and character names .
Whether for commercial or non-commercial use, you must state that you are using "CeVIO" and include the name of the character on your website, videos, CD packaging, title screen, etc.
Of course, you must also follow the terms of use for each character .
In the case of CeVIO characters, you must use them in a manner that does not violate the CeVIO Character License, and in the case of third-party products, you must use them in a manner that does not violate the terms of use specified for each character.
If you use CeVIO Project characters together with characters from third-party products, it may be a hassle to check the licenses of both.
When using CeVIO AI, you may need to register your usage status.
CeVIO AI can also be used commercially if used by individuals for some purposes .
However, for commercial use, you may need to register your usage depending on the purpose .
There is no need to register your usage status :
- Use for video posting (channel monetization, affiliate advertising, super chat, tipping, etc.)
- Use on your homepage or blog
- Song introduction on radio show
- Use for demo songs
These are the four types.
Other uses,
- Music media (DVD/CD) sales, download sales
- Video media (DVD/CD) sales, download sales
- Audio drama, audio book media (DVD/CD) sales, download sales
- Use for club events and concerts
- Sales of app/game media (DVD/CD) and download sales
- Use in classes
To do this, you will need to register your usage on the CeVIO official website .
For any other commercial use by individuals or for corporate use, you will need to request an individual quote from the seller .
CeVIO AI is software that can read aloud with a realistic voice, but because it is paid software with pre-defined characters, the license and terms of use are inevitably complicated.
If you want to use it for commercial purposes, such as monetizing your video posts, we recommend that you check the terms of use before purchasing.
How to download and install CeVIO AI [Windows 11]
Next, we will briefly explain how to purchase and install CeVIO AI.
Purchase and download of CeVIO Project products
CeVIO Project products can be purchased from various online shopping sites .
The product information page on the official website contains links to purchasing sites such as Vector and Amazon.
There are downloadable and packaged versions, but some characters may only be available as a downloadable version.
The CeVIO Project's original characters Sato Sasara, Suzuki Tsuzumi, and Takahashi are only available in the downloadable version.
Differences between the voice alone and the starter pack
In terms of price range and how to choose, if you are a first-time buyer , we recommend the starter packs "Talk Starter" and "Song Starter" .
The starter pack is a product that includes the voice itself and an editor .
In addition to the starter pack, the voices are also sold separately.
If you already have the editor and want to add a second or subsequent voice, you can simply purchase the voice alone.
CeVIO AI installation instructions
Next, we will explain the installation procedure for CeVIO AI.
Download CeVIO AI
First, in the menu of the CeVIO official website, click Download → CeVIO AI retail version .
If you scroll down on the download page for the CeVIO AI retail version, you will find a button that says "Download CeVIO AI [Retail Version]."
Click the button to download the installer.
CeVIO AI installation instructions
Once the download is complete, double-click to launch the installer.
Follow the installer's instructions and click "Next" to proceed with the installation.
Read the license and accept it if you are happy with it.
Select the folder where you want to install.
Usually there is no need to change this.
Now you're ready to go.
Press "Next" to begin the installation.
The installation will begin.
Once the installation is complete, launch CeVIO AI from the desktop icon or Start menu.
What to do if you can't start the game
When you start up CeVIO for the first time, it may not start up because it is missing files necessary for startup .
For example, this time "vc_redist.x64.exe" was missing and it could not be started.
If it doesn't start, open the Microsoft download page from the error message.
If you are unable to open it, search for "vc_redist.x64.exe" in your browser.
This will take you to the official Microsoft website, where you can download "vc_redist.x64.exe".
Once the file is downloaded, accept the license terms and conditions to install it.
You can now start CeVIO AI.
Enter the serial number and start
The first time you start the application, you will need to enter the serial number .
The serial number is included with the product you purchased.
However, you will not be able to use CeVIO without the serial number.
You need to purchase a product package for a fee.
CeVIO Creative Studio 7 (CS7) is available as a free trial version
CeVIO AI is paid software and there is no free trial version.
Instead, a trial version of the previous version of CeVIO Creative Studio 7 (CS7) is available on the official website.
The trial version of CeVIO CS7 includes the talk voices of Sato Sasara, Suzuki Tsuzumi, and Takahashi, as well as Sato Sasara's song voice.
The method for installing the trial version of CeVIO CS7 is almost the same as the method for installing CeVIO AI.
You can use the trial version by selecting "Start trial version" when launching the app and entering your email address.
The trial version can be used for 30 days.
Once launched, you can edit talks and songs just like in the retail version.
However, since you cannot export the audio, it cannot be used for purposes such as video narration.
CeVIO is a paid voice synthesis software, so it cannot be used for free.
If you want to use AI voice synthesis software for free , we recommend using other voice synthesis software such as "Ondoku."
[Free] How to choose the best voice synthesis software that is easy to use
CeVIO AI is a recommended choice for text reading.
However, since it is a paid speech synthesis software, it has the disadvantage that it can be difficult for those using text-to-speech software for the first time .
I think many people are reluctant to jump straight into using paid software when they are still unsure whether they can monetize YouTube.
What we recommend is to use a free text-to-speech service.
By using the AI reading service "Ondoku," you can create an AI reading voice for free .
We also recommend free voice synthesis services for video creation!
For those who are creating videos using voice synthesis software for the first time , we recommend using a free AI voice synthesis service .
In fact, voice synthesis software is not just paid software like CeVIO.
Advances in AI technology have led to the emergence of free services that are just as good as paid software like CeVIO !
One that I especially recommend is "Ondoku."
"Ondoku" is a free text-to-speech service.
We use the latest voice synthesis AI, so we can synthesize voices with the same or even greater realism as paid software!
Another feature is that it can read aloud in a wide variety of voices, including female, male, and child .
Benefits of a text-to-speech service that requires no installation
CeVIO AI is paid software that requires installation.
This requires purchase, download and installation.
On the other hand, you can start using "Ondoku" immediately by simply accessing it through your browser.
The appeal of this product is that it is easy to use whenever you want!
Free text-to-speech services can also synthesize voice into foreign languages
CeVIO AI is software that specializes in voice synthesis, mainly for Japanese.
Some products support English lyrics, but TalkVoice is designed to read Japanese lyrics.
It performs very well when it comes to high-quality speech synthesis in Japanese, but is not good at reading foreign languages.
We recommend the free reading service "Ondoku" .
Ondoku supports 48 languages , making it suitable for global content production.
By adding narration in a foreign language to your YouTube videos , you can attract more users to subscribe!
[Ondoku] Listen to the voices and sample voices for the supported languages | Text-to-speech software Ondoku
Here we will introduce Ondoku's supported languages and sample audio.
[Free] With "Ondoku" you can use it for commercial purposes and make money!
CeVIO AI has detailed terms of use set for each character.
If you intend to use them commercially, you must check the terms of use for each character separately.
In contrast, Ondoku 's terms of use are very simple.
Even if you use it for free, you can use it for commercial purposes as long as you include credit.
If you sign up for a paid plan, you can use it without crediting the account.
"Ondoku" is ideal for commercial use, such as for companies and corporations or for monetizing YouTube .
Why not try the AI text-to-speech software "Ondoku" for free?
As such, we recommend "Ondoku" for those new to voice synthesis!
It's free for commercial use, so it's perfect for monetizing YouTube.
If you're having trouble deciding which voice synthesis software to use, why not try out Ondoku for free first?
■ AI voice synthesis software "Ondoku"
"Ondoku" is an online text-to-speech tool that can be used with no initial costs.
- Supports approximately 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German
- Available from both PC and smartphone
- Suitable for business, education, entertainment, etc.
- No installation required, can be used immediately from your browser
- Supports reading from images
To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.
Email: ondoku3.com@gmail.com
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free