AI voice synthesis is recommended for telephone IVR (automated voice response)! Detailed explanation of how to create it and recommended points

Oct. 18, 2025

AI voice synthesis is recommended for telephone IVR (automated voice response)! Detailed explanation of how to create it and recommended points
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I want to know how to create IVR voice!

When you call a company's telephone hotline or call center, you may hear an automated voice saying, "Please select a number depending on the nature of your inquiry."

The system that plays this voice is called an "IVR" (Interactive Voice Response) system .

In fact, recently, more and more companies are creating IVRs using AI voice synthesis.

By using free speech software and apps , you can easily introduce an IVR.

In this article, we will explain in detail what an IVR (automated voice response) system is, how it works, and how to create IVR voice using a voice synthesis service .

Whether you're considering introducing IVR to your call center or developing an IVR automated voice response system, why not use this article as a reference to create a reading voice using the latest AI?

[Free and Commercial Use OK] AI speech synthesis service recommended for IVR automated voice response systems

Ondoku

"Ondoku" is an AI service recommended for IVR (interactive voice response systems) .

Its feature is that it uses the latest voice synthesis AI , which can generate realistic, easy-to-listen voices .

You can choose a voice that suits your IVR needs, such as a female voice or a male voice, to create clear IVR voice that sounds just like a professional narrator .

Another advantage is that voice synthesis is possible 24 hours a day, 365 days a year , so the IVR content can be updated at any time.

Of course, "Ondoku" is OK for commercial use! (For more information on commercial use, click here)

Since it 's free to use, we recommend that you first try out AI voice synthesis with "Ondoku."

It can be used as the voice for an IVR automated voice response system from as little as 1,000 yen per month , so it can be introduced at a low cost.

Why not try using the AI voice synthesis service "Ondoku" when implementing IVR or developing an automated voice response system?

[Free] How to create an IVR automated voice response system! Easy creation with the AI voice synthesis service "Ondoku"

I want to know how to create voice for IVR now!
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Now, let's explain how to create voice for IVR (Interactive Voice Response) using the AI voice synthesis service "Ondoku."

1. Write a script for your IVR voice (with examples)

Write the script text

First, write the script text for the audio to be played through the IVR (interactive voice response).

You can use any software that allows you to write text, such as Notepad or Word, to write the script.

For example, if you are using an automated voice response system at a call center, we recommend a script like this.

Thank you for calling. This is the customer service center for XX Co., Ltd. Please follow the voice guidance and press the numbers. For inquiries about new contracts, press 1; for changes to contract details, press 2; for cancellation inquiries, press 3; and for other inquiries, press 4.

You will be connected to an operator.

Our phone lines are currently very busy. We apologize for the inconvenience, but please wait or try again later.

2. Read the script text on the "Ondoku" website

Once the script is completed, it will be read aloud on the Ondoku website.

Ondoku

Once you open the "Ondoku" homepage, paste the script text into the text box.

Paste script text

At this time, it is recommended to enter the information for each audio call , such as "when the call first comes in" or "when connecting to an operator ."

Once you have entered your script, choose your language and voice type.

Select language and voice type

With "Ondoku," you can read Japanese aloud in over 16 different voices, including female, male, and child voices!

As an example, we will use the female voice "Nanami (guidance)," which is perfect for IVR automated voice response.

Ondoku allows you to adjust the reading speed and pitch, but when using it with an IVR, you can leave it at the default settings.

Now the speech synthesis is ready.

Ready

Press the "Read aloud" button to start speech synthesis.

The voice synthesis will be completed in just a few seconds and the screen will change.

Speech synthesis completed

An audio player will appear and the audio will start playing, so listen to it and if there are no problems, save the file.

For example, for this script text, we can synthesize the following voice.

Use the same process to create other voices to use in the IVR.

As you can see, the process of AI voice synthesis with Ondoku is very simple .

Why not try using Ondoku for free to create your own IVR voice for your call center?

How to adjust the interval between IVR voice messages

When reading a script, you may want to leave more time between each audio segment .

For example, in the example generated this time, I feel like I want to leave a pause after the part where the number is stated, like "For inquiries about new contracts, call 1. For changes to contract details, call 2."

In such cases, Ondoku allows you to create a gap in two ways.

Insert a period where you want to pause the audio.

"For inquiries about new contracts, please call 1. For inquiries about changes to your contract, please call 2."

By inserting a period (.) where you want to leave a pause , you can read the text aloud with a pause, as shown below.

You can also add a comma (,) to create a shorter pause.

Scripts containing "." and ","

Thank you for calling. This is the customer service center for XX Co., Ltd. Please follow the voice guidance and press the numbers. For inquiries about new contracts, press 1. For inquiries about changing contract details, press 2. For inquiries about cancellation, press 3. For other inquiries, press 4.

By reading this, you can synthesize a voice like this.

Using Speech Markup Language (SSML)

Ondoku allows you to add pauses using Speech Markup Language (SSML) .

for example,

By writing it like this, you can get a time interval of exactly 1000 milliseconds = 1 second .

When using SSML, first " ,lastly " " must be written.

For example, if you want to add a longer pause after "This is our customer service center" in this script text,

Thank you for calling. This is the customer service desk for XX Co., Ltd. Please follow the voice guidance and press the numbers. For inquiries about new contracts, press 1. For inquiries about changing contract details, press 2. For inquiries about cancellation, press 3. For other inquiries, press 4.

By entering it like this, you can get a long time of exactly 1 second.

This is what it actually looks like when read aloud.

To make call center automated voice response systems more user-friendly, it is important to fine-tune the pauses in the voice.

Please check out this article for information on how to use Speech Markup Language (SSML)!

3. Introduce the voice you created into the IVR (Interactive Voice Response System)

Introducing audio

All you have to do is introduce the voice created with "Ondoku" into your IVR (Interactive Voice Response System) !

Audio created with "Ondoku" can be downloaded in MP3 format , making it easy to load into IVR systems.

*It also supports downloading in WAV format from the history page.

In this way, with Ondoku, anyone can easily synthesize voice for automatic voice responses !

You can introduce IVR to your call center for free or at little cost , so why not give Ondoku a try?

What is an IVR (Interactive Voice Response System)? Explaining its Mechanism and Features

How does IVR work? How does it deliver automated voice messages?
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From here, we will explain the basic mechanism and features of IVR (Interactive Voice Response System).

What is the basic mechanism of IVR? Answering customer calls with an automated voice response system

What is the basic mechanism of IVR?

IVR (Interactive Voice Response) is a system that responds to calls made to a call center by playing voice messages .

Calls can be assigned to specific personnel or departments by having callers follow the automated voice instructions and operate the phone buttons.

IVR is an abbreviation for "Interactive Voice Response" and in Japanese it is called an "automatic voice response system" or "automatic voice response system."

The IVR system is very simple.

When a customer calls a company's phone number, they are first automatically answered by an IVR (Interactive Voice Response) system .

Thank you for calling. This is XX Co., Ltd.

Follow the voice guidance and press the number. For inquiries about usage, press 1, for repairs or replacements, press 2, and for other inquiries, press 3.

An automated voice response message like this will be played.

When a customer presses a button on their phone, the IVR system recognizes the number entered and transfers the call to the appropriate department or call center operator .

More and more companies are adopting IVR. What are the features and benefits of automated voice response?

Recently, more and more companies are introducing IVR.

The main reason is to solve the problem of labor shortages .

There is a chronic shortage of call center operators , and recruitment remains difficult.

By introducing IVR, all calls can be answered by automated voice response, making it possible to handle calls efficiently with limited staff.

Another reason is that it allows us to provide better service to our customers .

Customers expect to be able to contact businesses 24 hours a day.

IVR allows you to respond to customers outside of business hours using automated voice response , allowing you to provide more detailed support to your customers.

AI speech synthesis technology makes IVR more accessible

Another reason why IVR is becoming more popular is the significant advances in AI voice synthesis technology .

Until now, automated voice responses could only read in an unnatural, robotic voice, but the latest speech synthesis software is now capable of reading in a natural, human-like voice .

With the advent of free or low-cost text-to-speech apps and software , it has become much easier than ever to implement IVR and automated voice response systems.

If you are planning to introduce IVR, we recommend creating a reading voice using the latest AI speech synthesis apps and software.

Why not try creating your own automated voice response system for a call center using Ondoku , using the instructions explained in this article as a reference?

Introducing the uses and applications of IVR (Interactive Voice Response System)

IVR uses and scenarios

IVR (Interactive Voice Response) systems are used in a variety of situations.

We will introduce specific uses and scenarios.

Introducing IVR to corporate call centers and customer service centers

IVR is most commonly used in corporate call centers and customer service centers .

When you call customer support at a major company, in most cases the first person to answer is a voice generated by text-to-speech software.

By introducing IVR into a company's call center or customer service desk, telephone inquiries can be sorted in advance.

This allows customers to connect to an operator with specialized knowledge for each inquiry , thereby reducing waiting times.

Also, when the call center's lines are busy , it is possible to play a message saying, "We are currently experiencing high volumes of calls."

There is a limit to the number of calls that an operator can handle, but by using AI speech synthesis software and an automated voice response system, any number of calls can be taken at the same time.

By utilizing free AI speech synthesis software and apps, it is now possible to easily create automated voice calls for call centers at a much lower cost than ever before.

Even small companies, offices, and organizations can implement IVR , so it is recommended that future automated voice response systems use AI speech synthesis software or apps.

We also recommend an automated voice response system for your reservation system.

IVR can also be used for reservation reception at hospitals, hotels, restaurants, beauty salons, etc.

By creating a reading voice using an AI speech synthesis app and implementing IVR, you can accept reservations via automated voice response 24 hours a day .

By following the automated voice response guidance, customers can enter the date and time using the buttons on their telephone, and the information will be automatically registered in the database and reservations will be accepted.

With labor shortages becoming an issue, accepting reservations over the phone is a huge burden for staff.

By using AI speech synthesis software and apps to create voice readings for automated voice responses, you can improve the working environment for your staff and increase customer satisfaction .

Utilizing IVR for local government inquiries, administrative services, and disaster information

IVR (Interactive Voice Response System) is also widely used in local governments such as city halls and ward offices .

Calls to local government offices can be automatically transferred to the appropriate department using IVR .

It is also possible to automate routine procedures such as reserving bulky waste collection and checking the application status of various certificates using an automated voice response system .

In the event of a disaster , the IVR's automated voice response can provide information on evacuation shelters, water supply locations, safety information, and more.

AI speech synthesis software and apps that can quickly create speech are particularly useful in situations where rapid response is required, such as disasters .

Another reason why IVR is suitable for providing information in emergencies is that it can respond when many residents call at the same time .

IVR automated voice response is often used to request redelivery of parcels.

Call centers that handle redelivery requests for parcels are another typical example of where IVR, which utilizes automated voice response, is used.

When you call the delivery company, an automated voice will come through the IVR.

Recently, customers have been able to complete the redelivery process by simply entering the number printed on the delivery slip into their phone .

IVR eliminates the need for call center operators to respond, which helps to alleviate labor shortages among delivery companies.

Unlike before, customers no longer have to wait to be connected to a call center operator, and can now more easily request redelivery at any time, 24 hours a day.

Recently, with the increase in mail order demand from overseas, there has been a surge of new entrants into the courier service industry.

If you are planning to build a new redelivery reception system , we recommend introducing an automated voice response system using an AI voice synthesis service .

What are the benefits of companies introducing IVR (Interactive Voice Response) systems?

Benefits of introducing IVR (Interactive Voice Response) systems to businesses

IVR (Interactive Voice Response) offers significant benefits to both businesses and customers.

First, we will explain the benefits of companies, organizations, and groups introducing IVR.

Streamline call center operations with IVR (Interactive Voice Response)

The biggest benefit of introducing IVR (Interactive Voice Response) is that it can streamline operations at call centers and other places .

By implementing an IVR, you no longer need to answer every call.

Simple inquiries and information requests can be handled using only an automated voice response system, allowing call center operators to focus solely on responding to complex inquiries.

This means that the same number of operators can handle more calls.

Reducing labor costs is also a benefit of IVR (Interactive Voice Response)

Another benefit of introducing IVR (Interactive Voice Response) is that it can reduce labor costs .

This will significantly reduce labor costs as there will no longer be a need to hire a large number of call center operators just to answer phone calls.

Particularly effective is answering phone calls at night and on holidays.

By creating a reading voice using AI speech synthesis software and implementing IVR, you can provide 24-hour telephone support at no additional cost.

Preventing unreachable calls and increasing customer satisfaction

Another major benefit is that it prevents missed phone calls .

There is a limited number of call center operators, so in the past, calls could be disconnected during busy times.

By implementing an IVR, you can take any number of calls at the same time and respond to all your customers.

Efficient allocation of call center operators

By implementing IVR, you can allocate call center operators according to their skills .

By using an automated voice response system to assign calls based on the content of the inquiry, it is possible to have new operators handle simple inquiries and experienced operators handle more complex inquiries.

In this way, by introducing an IVR (interactive voice response system), it is possible to efficiently operate telephone help lines for companies, organizations, and groups .

The reading voices used in IVRs must be custom-made for each company, organization, or group.

If you are planning to create voice for IVR, we recommend the AI voice synthesis service "Ondoku."

It's free to use, so why not try out voice synthesis with "Ondoku" first?

Benefits of IVR (Interactive Voice Response System) for Customers and Users

Benefits for IVR customers and users

IVR (Interactive Voice Response) has many benefits for customers and users alike.

Introducing an IVR using an AI speech synthesis service can greatly increase customer satisfaction.

IVR can reduce call center waiting times

The biggest benefit of IVR for customers is that it significantly reduces waiting times on the phone at call centers .

The IVR automatically routes inquiries, ensuring that calls are connected to a live person smoothly.

This significantly reduces customer frustration as they no longer have to call back when the line is busy .

Another major benefit is that if you call the wrong department, you won't have to wait for your call to be transferred.

Automated voice response available 24 hours a day for inquiries and phone calls

Another major benefit of IVR is that you can make inquiries 24 hours a day .

Introducing an automated voice response system allows customers to call at a time that is convenient for them, regardless of business hours.

Even if you call late at night or early in the morning, you can get basic information such as business hours and holidays through an automated voice response system.

Even in the event of a sudden temporary closure , you can create a voice using AI speech synthesis software and use an automated voice response to inform customers of the closure .

IVR also has the advantage of protecting privacy

IVR also offers the benefit of protecting privacy .

By introducing an automated voice response system, you can enter personal and confidential information using the buttons on your telephone and have it processed on the system.

Since there is no need to verbally communicate with a telephone operator , the possibility of private information being leaked is greatly reduced.

You can safely enter information that you don't want others to hear, such as your credit card number or PIN.

Prevent operator mistakes with IVR

IVR also helps prevent call center operators from mishearing or making input errors .

People can mishear when they are tired or lack concentration.

No matter how skilled a telephone operator is, there is always a chance of making a mistake.

By creating a reading voice using AI speech synthesis software and introducing IVR, you can accurately recognize the information entered by customers , preventing mistakes in advance.

In this way, IVR (Interactive Voice Response) systems offer great benefits to customers.

To increase customer satisfaction, why not try creating a reading voice for your IVR using the AI speech synthesis service "Ondoku" ?

What are the benefits of creating IVR voice using AI speech synthesis apps and software?

What are the benefits of creating IVR voice using AI speech synthesis apps and software?

If you want to create a reading voice for IVR, we recommend using AI speech synthesis software or a reading app!

We will briefly explain why AI voice synthesis software and apps are recommended when introducing IVR.

If you are looking to implement IVR, we recommend "Ondoku"

Ondoku

If you are considering introducing IVR, we recommend the free-to-use "Ondoku."

You can easily create clear audio that sounds like a professional narrator, perfect for automated voice response systems.

Ondoku, which uses AI to synthesize voice, has the following benefits:

You can create IVR voice-to-speech at a low cost

By using AI speech synthesis software and apps, you can create reading voices for IVR at a low cost .

If you hire a professional narrator, it is not uncommon for it to cost hundreds of thousands of yen to create audio for an IVR.

However, if you use AI speech synthesis software or a reading app, you can keep costs down.

The AI voice synthesis service "Ondoku" is free to use , so you can introduce IVR with zero initial costs.

AI speech synthesis software and apps make it easy to edit and add content

If you hire a professional narrator to record your audio, there will be an additional cost for each change you make to your IVR .

With AI speech synthesis software and apps, there is no additional cost no matter how many times you rewrite the content of your automated voice response.

This can also be used when you need to frequently update your automated voice response content, such as when changing service content or business hours.

If you want to implement and operate an automated voice response system with minimal production costs, we recommend using AI voice synthesis software or apps .

Quick response to content corrections and changes

With AI voice synthesis software and apps, you can rest assured even when you need to make sudden changes .

There are plenty of opportunities to update your IVR voice, whether it's launching a new service, changing hours, or restructuring.

If you hire a professional voiceover artist to record your messages, you'll have to wait days or even weeks to reschedule the recording every time you change your automated voice response.

If you create IVR voice using AI voice synthesis software or an app, you won't have to go through all that trouble.

You can quickly create new IVR voices the same day you need to make changes.

With the AI voice synthesis service "Ondoku," you can create an AI voice in just a few seconds by entering text.

We can respond flexibly to sudden changes.

Create IVR voices in foreign languages using AI speech synthesis software and apps

Another convenient feature of AI voice synthesis software and apps is that they can create IVR voices in foreign languages .

In the tourism industry, where there are many inbound tourists from overseas , and in municipal facilities with many foreign residents , creating IVR voices using AI speech synthesis software and apps can accurately convey information.

The AI voice synthesis service "Ondoku" supports over 48 languages.

It can synthesize speech in a variety of languages, making it suitable for a wide range of applications, from the tourism industry to resident services for foreigners.

Ability to create and test multiple IVRs

Using AI voice synthesis software or apps, you can create and test multiple versions of your voice .

for example,

  • For product inquiries, please press 1
  • If you want to know more about the product, press 1.

By changing the detailed wording of the automated voice response, you can easily conduct A/B testing to see which option results in higher customer satisfaction.

AI voice synthesis software and apps make it easy to create automated voice responses, so you can change the content depending on the season or campaign.

  • New Year's holiday business hours
  • Summer Holiday Notice
  • New product campaign information

You can provide detailed information to your customers.

As such, we recommend using AI voice synthesis software and apps for future IVR implementations.

Why not try creating your own IVR voice using the AI voice synthesis service "Ondoku" ?

Why not effectively implement an IVR (Interactive Voice Response System) using an AI speech synthesis service?

IVR is a very powerful tool that can improve the efficiency of telephone responses for companies, organizations, and groups and increase customer satisfaction.

Not only can automated voice response provide 24-hour support, it can also reduce the burden on call center operators and cut labor costs.

By utilizing the latest AI speech synthesis software and text-to-speech apps, you can create high-quality voice for automated voice responses while significantly reducing costs .

With the AI voice synthesis service "Ondoku ," you can generate natural IVR voices simply by entering text.

It's free to use, so why not try creating a text-to-speech voice for your IVR using Ondoku ?

■ 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.

Text-to-speech software "Ondoku" can read out 5000 characters every month with AI voice for free. You can easily download MP3s and commercial use is also possible. If you sign up for free, you can convert up to 5,000 characters per month for free from text to speech. Try Ondoku now.
HP: ondoku3.com
Email: ondoku3.com@gmail.com
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