A.I.VOICE2 Complete Guide! Detailed Explanation of VOICEROID Successor Software Features, Installation, and Usage

A.I.VOICE2 is the latest AI speech synthesis software and the successor to the VOICEROID series.

You can use characters familiar from VOICEROID videos, such as "Yuzuki Yukari" and "Kotonoha Akane/Aoi," to read text aloud with natural-sounding voices.

A key feature is its compatibility with both Windows and macOS.

Many people are likely curious about what has changed from VOICEROID and which character they should choose.

In this article, we will explain in detail all the information necessary for those who want to start using A.I.VOICE2, including:

• Features of the speech synthesis software A.I.VOICE2
• Differences from VOICEROID
• Installation methods and usage
• Recommended AI text-to-speech services

If you are thinking about trying A.I.VOICE2, considering switching from VOICEROID, or looking for a way to read text aloud, please use this article as a reference to find the perfect speech synthesis software for you.

[Free / Commercial Use OK] Recommended Latest AI Text-to-Speech Services

If you want to create voiceovers, there is a free text-to-speech service we recommend for you.

It is the latest AI service, "Ondoku"!

"Ondoku" is a text-to-speech service that can be used for free.

It works in any environment, including Windows, Mac, and Linux, as well as iPhone and Android smartphones.

It is easy to use—just enter your text!

It can be used immediately without installation and allows for comfortable reading regardless of your PC's specifications.

Furthermore, "Ondoku" is OK for commercial use for free!

Why not try making a video for free using "Ondoku's" easy-to-listen and realistic voices?

What is the Speech Synthesis Software A.I.VOICE2? Explaining the Differences from VOICEROID

First, let's briefly explain A.I.VOICE2.

A.I.VOICE2 is the Successor Software to the VOICEROID Series

A.I.VOICE2 is a speech synthesis software for individuals developed and sold by AI Inc.

It is the latest version of the product series that the company, which previously provided the speech synthesis engine "AITalk" to other brands, is now expanding for individual users under its own brand.

"A.I.VOICE" appeared in 2021, and sales of the currently available "A.I.VOICE2" began in 2023.

A.I.VOICE2 uses AITalk6, which has improved performance compared to the speech synthesis engines used in the previous VOICEROID series (VOICEROID and VOICEROID2) and A.I.VOICE.

It has become possible to generate voices that are even more human-like and natural than before.

The Latest Software Where You Can Use VOICEROID Series Characters

A.I.VOICE2 features a lineup of characters that were previously sold as "VOICEROID" and "VOICEROID2."

Even now, popular characters like "Yuzuki Yukari," "Kotonoha Akane/Aoi," and "Kizuna Akari" are often referred to as "VOICEROID" or "Boiro."

Because of this, many people find themselves wondering:

In conclusion, as of 2025, if you want to read text using VOICEROID characters, you should buy A.I.VOICE2.

By purchasing A.I.VOICE2, you can use the characters popular in VOICEROID Let's Plays for your text-to-speech needs.

By the way, videos using A.I.VOICE and A.I.VOICE2 are still often called "VOICEROID videos" or "VOICEROID Let's Plays."

[2025 Edition] The Complete VOICEROID Guide! Detailed Explanation of History, Characters, Usage, and Boiro Culture | Text-to-Speech Software Ondoku

Introducing the history, characters, and latest 2025 usage of VOICEROID. Explaining popular characters like Yuzuki Yukari and Kotonoha Akane/Aoi, Boiro culture, Voiceroid/Cevio, and software talk.

Points of Evolution from the VOICEROID Series to A.I.VOICE2

The major difference from the previous VOICEROID and VOICEROID2 is the advancement of the generation of the built-in speech synthesis engine.

A.I.VOICE2 uses the latest engine called AITalk6, which is more powerful than those in previous VOICEROID and VOICEROID2 versions.

As a result, it provides more natural reading compared to VOICEROID.

By utilizing deep learning technology, it achieves more human-like vocalization.

In addition to the existing Windows support, it now also supports macOS, making it accessible to a wider range of users.

A.I.VOICE2 is Paid Software

A.I.VOICE2 is paid software, just like the previous VOICEROID, VOICEROID2, and A.I.VOICE.

You must purchase the software to use it for reading text.

A.I.VOICE2 is available in package and download versions.

The package version is sold starting from 16,280 yen, and the download version starting from 12,980 yen.

*Prices are as of 2025.

Notes on Licensing and Commercial Use

When purchasing A.I.VOICE2 for text-to-speech use, you must use it in accordance with the license.

One thing to be especially careful about is the number of installations.

The paid package of A.I.VOICE2 is permitted to be installed on only up to two PCs.

If you wish to install it on another PC, you must uninstall it from a PC where it is already installed.

Also, when using A.I.VOICE2 for commercial purposes, you must comply with the license.

If you are an individual producing videos to publish on video sites or for monetization, purchasing the paid package is sufficient.

However, even for individual use, a personal commercial license is required for the paid distribution of video or audio, or for use in automated voice guidance for telephones, etc.

Furthermore, corporate users must enter into a corporate license agreement.

Please note that for both individuals and corporations, a commercial license is mandatory if the software is used for work.

Pay Attention to Character-Specific Terms of Use

In addition to the A.I.VOICE2 main license, you must also pay attention to the terms of use for each character.

Since different terms of use are set for each character, when using multiple characters, you need to check each set of terms individually.

When using character standing illustrations in videos, you must also separately comply with the terms of use for those illustrations.

[Free] Recommended AI Reading Method for Easy Commercial Use by Individuals and Corporations

There may be cases where it is not appropriate to display credits in official corporate videos or product introduction videos, or where credit notation is difficult due to design constraints.

In such cases, "Ondoku" is recommended!

"Ondoku" is an AI text-to-speech service that can be used commercially for free.

By using a paid plan, credit notation becomes unnecessary.

It can be used for any commercial purpose, such as corporate use, product sales, or YouTube monetization.

Commercial use is possible even with the free plan just with credit notation, so you can consider a paid plan after trying it for free.

Why not experience "Ondoku", which can be used for free, first?

Popular Characters Available in A.I.VOICE2

A.I.VOICE2 includes AI Inc.'s original characters and third-party characters owned by other companies.

Here is a brief explanation of the particularly popular characters.

Kotonoha Akane & Kotonoha Aoi | Popular Sister Characters in VOICEROID Videos

Kotonoha Akane and Kotonoha Aoi are original characters of AI Inc.

They are representative characters released as part of the first A.I.VOICE2 lineup and are loved by many creators.

The pink-haired Kotonoha Akane is an energetic character who speaks in the Kansai dialect, and her bright, active personality is charming.

The light-blue-haired Kotonoha Aoi is set as a calm character speaking in standard Japanese, giving a cool and intellectual impression.

Because it is easy to assign roles within a video, they are also ideal for those who want to start making VOICEROID videos for the first time.

Iori Yuzuru | A Male Character with a User-Friendly Voice

Iori Yuzuru is also an original character of AI Inc.

You can read text with a male voice that is gentle and calm yet rich in emotion.

This is also one of the characters released in the first A.I.VOICE2 lineup, featuring an elegant and easy-to-hear voice.

It is a character that is easy to use in formal settings, such as business use or educational content.

Yuzuki Yukari | A Popular Character with a Calm Voice in VOICEROID Videos

Yuzuki Yukari is a popular third-party character in VOICEROID Let's Plays.

Known for her soulful voice, she is favored by many video contributors.

She is widely known for "Yukari Let's Plays" on YouTube and Nico Nico Douga.

She is applicable to a wide range of content.

In the A.I.VOICE2 version, special voice styles are included in addition to the standard Yuzuki Yukari.

"Shizuku" was recorded with the image of her voice at age 13, giving a more youthful and cute impression.

"Nagi" is a voice style recorded in a calmer tone.

Kizuna Akari | A Popular Third-Party Character on Video Sites

Kizuna Akari is also one of the third-party characters.

Her voice is attractive for its brightness and cuteness mixed with kindness.

This voice is suitable for bright videos and fun content creation, and it has the characteristic of easily giving viewers a sense of familiarity.

The A.I.VOICE2 version includes voice styles inspired by different ages in addition to the standard Kizuna Akari.

"Tsubomi" was recorded with the image of her voice at age 10, giving a more childish and cute impression.

"Moe" was recorded with the image of her voice at age 5, resulting in a very childish voice.

How to Download & Install A.I.VOICE2 [Windows 11]

Next, we will briefly explain how to purchase and install A.I.VOICE2!

*Explained using Windows 11 24H2.

How to Purchase and Download A.I.VOICE2

A.I.VOICE2 can be purchased on the official A.I.VOICE website or various online shops.

You can choose between the package and download versions, but some characters may only be available as a download version.

Additionally, A.I.VOICE2 has a trial version that can be used for free.

Here, we will explain the download and installation method using the trial version as an example.

When you open the A.I.VOICE2 website, there is a "Click here to download the trial version" button.

Clicking it opens the download page on the A.I.VOICE user support site.

Click on the character you want to use to open the character-specific download page.

In this case, we will download the trial version for Kotonoha Akane & Kotonoha Aoi.

Click Windows or Mac depending on the computer you are using to download the file.

Since we are using Windows 11, click the Windows icon.

The file downloaded at this point has a small size, so the download will finish quickly.

Data such as the speech synthesis engine will be downloaded after the installer starts.

A.I.VOICE2 Installation Procedure

Once the download is complete, extract the ZIP file.

Double-click setup.exe in the folder to start the installer.

A Windows security warning may appear, but since it is a file downloaded from the official site, select "Run" to proceed.

Click the software you want to install from the options in the installer.

As an example, we will install "A.I.VOICE2 Kotonoha Akane (NV)."

Clicking it starts the setup wizard.

After reading the license agreement, check "I agree to the terms of the license agreement" and click "Install."

The installation will begin.

At this time, it is recommended to work in a location with a good internet connection because files of several hundred MB, such as the editor and speech synthesis engine, will be downloaded.

A progress bar is displayed during installation, and it takes several minutes to complete.

When the installation completion screen appears, click "Finish" to close the installer.

Initial Startup and Activation of A.I.VOICE2

Start the software from "A.I.VOICE2 Editor" in the "AI" folder of the Start menu.

Upon startup, a confirmation dialog appears saying, "There are unauthenticated characters. Would you like to activate?"

If you have already purchased it, clicking "Yes" allows you to activate (authenticate) the license.

Pressing "No" will start the trial version as is.

The trial version is available for 14 days.

Basic Usage of A.I.VOICE2

A.I.VOICE2 has now been successfully installed on your Windows 11 PC.

Next, we will explain the basic usage for actually reading text aloud.

Basic Operations for Voice Generation

When you open the A.I.VOICE2 screen, the character icon and text input field are displayed.

Clicking on the text input field allows you to enter text.

Clicking the "+" on the text input screen allows you to add a new text input field.

Pressing the "Play" button allows you to play the audio and check the generated result.

At this time, the triangular play button at the top of the screen plays the entire text, while the red button labeled "Play" at the bottom plays only the selected part.

Adding Characters

In A.I.VOICE2, you can add and install characters.

The method for adding characters is the same as the initial installation.

Download the installer for the character you want to use and perform the installation in the same way.

In this case, we have additionally installed "Yuzuki Yukari."

Starting A.I.VOICE2 after installation is complete shows that the number of installed characters has increased like this.

In the editing screen as well, Yuzuki Yukari is displayed in the character list on the left side of the screen like this.

Click and hold Yuzuki Yukari in the character list on the left, then drag and drop her onto a line of dialogue in the editing screen on the right.

Then, the character for the dialogue you dragged and dropped onto changed from Kotonoha Akane to Yuzuki Yukari.

Also, when you click "+", a line of dialogue is added for the character selected in the character list on the left.

In this way, by adding multiple characters, you can create conversational text-to-speech audio.

Saving a Project

In A.I.VOICE2, it is possible to save a project from "File" in the menu.

Also, like many Windows software programs, you can save with "Ctrl + S."

(You can save with "Command + S" on a Mac)

Exporting Audio

To export audio in A.I.VOICE2, there are two methods:

• Bulk export
• Export by dialogue

A.I.VOICE2 Bulk Export Method

Clicking the "Bulk Export" button at the top right of the screen allows you to export the entire audio at once.

Clicking the button opens a window to select the save destination.

After selecting the save destination, the read content is saved as a WAV file.

In "Bulk Export," it is saved as separate files for each line of dialogue like this.

A.I.VOICE2 Export Method for Individual Dialogue

To export by dialogue, first click the dialogue you want to export to make it selected (highlighted in light blue).

Next, click "Dialogue" → "Export" from the menu at the top of the screen.

A window to select the save destination opens.

Clicking "Save" will save only the selected audio.

When Exporting with the Trial Version, "This is a demo voice" is Overlaid

The export function can be used in the trial version, but "This is a demo voice" is repeatedly recorded, overlapping the content of the audio.

(It is not inserted before or after the voice but recorded to completely overlap.)

Since the trial version is provided to check the operations and functions, purchasing the product is necessary to actually use it in videos, etc.

In this way, by using A.I.VOICE2, you can read text with the voices of popular characters like Kotonoha Akane/Aoi and Yuzuki Yukari.

However, A.I.VOICE2 is paid software, so it cannot be used for free.

Also, even if you install the trial version, you cannot export and use the audio.

If you want to produce text-to-speech audio for free, using text-to-speech software that can be used from a browser is also recommended.

Recommended Free AI Text-to-Speech Software [Commercial Use OK]

"Ondoku" is an AI text-to-speech software that is free to use and OK for commercial use!

As a web app used from a browser, anyone can easily create high-quality audio.

"Ondoku's" 16 types of Japanese voices offer a rich variety, including male, female, and children's voices!

Of course, just like A.I.VOICE2, conversational reading using multiple voices is possible.

You can listen to samples on this page, so please take a look.

Furthermore, "Ondoku" supports about 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German.

Since you can produce global content, you can increase YouTube views by targeting the whole world.

Commercial Use OK for both Individuals and Corporations! Easily Monetize YouTube

The terms of use for "Ondoku" are very simple.

Commercial use is OK even with the free plan just with credit notation.

Furthermore, credit notation becomes unnecessary with a paid plan.

Since it can be used not only by individuals but also by corporations, you can use it with peace of mind even for business.

With "Ondoku", you can use it for commercial purposes without worrying about complex terms, from YouTube monetization to in-store announcements.

No Installation or Download Required—Available for Free Right Now!

Using "Ondoku" is very easy.

Just open the top page, enter your text, and press the read button.

A natural audio file is generated in just a few seconds.

Speech synthesis up to 5,000 characters can be used for free, so why not experience "Ondoku" first?

Why Not Try Free Text-to-Speech with "Ondoku"?

In this article, we explained the features of A.I.VOICE2, the differences from VOICEROID, the installation method, and usage in detail.

The biggest attraction of A.I.VOICE2 is the ability to create videos using popular characters such as "Kotonoha Akane & Kotonoha Aoi."

However, there are situations where it might be difficult to use, such as the fact that it is paid software and you need to purchase it, and there are restrictions on commercial use.

If you want to read text aloud using the latest AI, the web service "Ondoku" is also recommended.

With "Ondoku," which can be used immediately without installation, why not try creating video audio for free yourself?

■ 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.