[Free] If you're looking to implement a telephone guidance system, we recommend an AI app! Tips for improving call center efficiency
Oct. 16, 2025

When you call a helpline or call center , you may hear a voice prompt .
Using voice guidance can help improve the efficiency of operations at call centers, companies, and stores.
In fact, anyone can easily create automated voice guidance using the latest AI !
Automated voice guidance, which previously cost hundreds of thousands of yen, can now be created for free using the latest AI reading software and apps.
This article explains in detail how to implement voice guidance on telephones , from specific steps to precautions to take.
We also introduce free AI software and apps, as well as IVR systems (interactive voice response systems).
Whether you're looking to introduce new telephone voice guidance or reduce call center operating costs, why not use this article as a reference to create your own voice guidance audio?
[Free] Recommended AI reading app for introducing voice guidance to telephones
If you are looking to introduce voice guidance to your call center, we recommend "Ondoku" !
"Ondoku" is an AI app that uses the latest AI to create automatic voice guidance .
Anyone can easily synthesize clear voice that sounds like a professional narrator.
The voice is synthesized using AI, so you can create voice guidance 24 hours a day .
What's more, "Ondoku" is free!
Commercial use is permitted , so it's perfect for companies and organizations that want to create audio guidance (click here for more information about commercial use) .
If you want to introduce voice guidance to your call center, why not try out the AI reading service "Ondoku" for free first?
Create a free telephone voice guidance! How to create an automated voice guidance with "Ondoku"

Now, let's take a look at how to create automated voice guidance for telephone calls for free!
Please use this as a reference when introducing voice guidance for telephones.
1. Create a script for the telephone voice guidance

First, create the script text .
The key to writing a script for a telephone voice guidance is to provide easy-to-understand options that customers can use without hesitation .
We recommend narrowing your options down to three or four .
If you offer too many options, your customers are more likely to hang up before they finish.
Example of a call center voice guidance script
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 inquiries about cancellation, press 3; and for other inquiries, press 4.
It is recommended to keep the configuration simple like this.
Example of a script for recording calls at a call center
When recording a call with a call center operator , it is recommended to inform the caller about the recording using voice guidance .
for example,
Please note that this call is being recorded to improve the quality of our customer service.
By providing such guidance, you can reassure customers and prevent problems from occurring.
2. Create automated voice guidance for telephone calls with "Ondoku"
Once the script text for the telephone voice guidance is complete, Ondoku will read it aloud using an automated voice.
Open the "Ondoku" homepage.
Paste the script into the text box on the top page.
When reading out the contents of telephone voice guidance, it is recommended to paste and read each guidance message.
As an example, we will read out the initial announcement that plays when a customer calls.

Select the language and voice type.

"Ondoku" supports multiple languages, including over 48 languages.
For example, in Japanese, it can be read aloud in 16 different voices, including female, male, and child voices.
You can listen to an audio sample in this article.
Ondoku also allows you to adjust the pitch and reading speed of the voice.
*When reading out the contents of the telephone voice guidance, you can leave it at the default setting.
Now you're ready.

Press "Read Aloud" to start creating your voice .
The reading takes just a few seconds .
The screen will change and the audio will play.

Listen to the content and if there are no problems , press "Download" to save the file .
Now you can use Ondoku to read out the contents of the telephone voice guidance.
3. Introducing a voice file for audio guidance
Once the audio file is complete, it can be introduced into the IVR system (interactive voice response system) .
If you save the file from the "Download" button displayed on the top page of "Ondoku ," the MP3 file will be downloaded.
You can also download WAV files by opening the "History" page of "Ondoku."

Many IVR systems (interactive voice response systems) support loading MP3 and WAV files , so you can use files saved from Ondoku as is.
This completes the process of having the AI reading app "Ondoku" read out the contents of the telephone voice guidance.
As you can see , you can easily create reading files for voice guidance for free , so why not try using Ondoku 's AI voice when introducing voice guidance?
What are the features of telephone voice guidance and the benefits of introducing it?

Voice guidance on your phone has many benefits.
From here, we will explain the basic features of voice guidance and the benefits of introducing it.
What is telephone voice guidance? Recommended for counters and call centers
Telephone voice guidance is a system that automatically provides voice guidance to calls made to a company or organization's telephone hotline or call center.
Also known as an IVR system (interactive voice response system) , it is widely used in call centers and corporate reception desks.
When you implement telephone voice guidance, an automated voice message will be played first when a customer calls.
When the customer presses a button on the phone following the voice guidance, the call will be transferred to a representative or department.
Furthermore, you can do it just by pressing the buttons on your phone.
- Reservations for shops and facilities
- Redelivery service for courier services
Systems that allow for procedures such as these are also now available.
As the shortage of call center operators becomes more serious, this system is attracting more attention than ever as a way to respond to customer calls more efficiently .
Benefits of introducing telephone voice guidance
The biggest benefit of introducing telephone voice guidance is that it can significantly improve the operational efficiency of call centers .
By automating basic instructions and procedures with voice guidance , the number of times call center operators have to respond can be reduced.
This allows call center operators to focus solely on complex inquiries, improving response quality and increasing customer satisfaction.
Another advantage is that it reduces labor costs .
This eliminates the need to hire call center operators just to answer phone calls, significantly reducing labor costs.
Another major benefit is that calls can be answered automatically outside of business hours and on holidays .
You can introduce voice guidance for free by using AI text-to-speech software and apps.
For those looking to implement voice guidance on their telephones in the future, we recommend the AI reading app "Ondoku."
Why we recommend a free AI app for implementing telephone voice guidance

When introducing telephone voice guidance, we recommend using a free AI reading app or software.
With the AI reading app "Ondoku," you can easily create reading audio for free.
When introducing voice guidance to telephones, reading audio is important
Until now, when creating audio guidance, we had to ask professional narrators to record it.
If you hire a narrator to record the audio, it will cost a lot of money to produce it.
Moreover, every time there was a change in business hours or an update to the services offered, additional recording costs were incurred.
However, with AI text-to-speech software and apps, you don't have to worry about that !
With this free AI text-to-speech app, anyone can generate natural-sounding speech simply by entering text .
You can create natural-sounding voices like professional narrators for free , so all you have to do is import the audio files into your IVR system (interactive voice response system).
The barrier to introducing telephone voice guidance has been significantly lowered because it is free of charge and audio can be created immediately without waiting times .
What's more, the free AI text-to-speech app can be used 24 hours a day , so it can also respond if there are any sudden changes to the content of the telephone voice guidance.
Easily implement voice guidance with a cloud-based IVR service
Recently, with the spread of cloud-based IVR services , there is no longer any need to purchase dedicated telephone equipment.
There is no need to purchase expensive telephone equipment, and voice guidance can be created entirely on the cloud, so there are almost no initial costs.
Cloud-based IVR services make it easy to load MP3 and WAV files , so you can quickly introduce audio files created with AI text-to-speech software and apps.
Even small and medium-sized businesses and sole proprietors can now implement telephone voice guidance
By using AI-reading voice and IVR services, you can introduce telephone voice guidance for free or at little cost.
Voice guidance, which was previously only available at call centers of large companies, can now be implemented by small and medium-sized businesses and sole proprietors.
By using free AI text-to-speech apps and software, you can create audio files for voice guidance simply by entering text .
If you want to easily implement voice guidance over the phone, we recommend using an AI text-to-speech app or software .
Points to consider when checking the voice guidance provided by the telephone

When you have created a voice readout for telephone voice guidance, we recommend checking it by actually listening to the audio in an IVR system (interactive voice response system) .
We will explain the points to check when checking reading audio for call centers and telephone helplines.
Check the tempo and timing of the telephone voice guidance
When you actually play an audio file on an IVR system (interactive voice response system), you may notice a difference in the tempo and pauses of the speech compared to when you listen to the audio file on a PC.
- I want to leave more space between sentences.
- I want to add space before the selection number
In such cases, simply modify the script text and regenerate the audio using an AI reading app .
Ondoku can synthesize voice in just a few seconds , so you can quickly edit the content of the voice guidance.
This article explains how to correct the pauses in audio in Ondoku .
Please take a look.
Check whether the options in the telephone voice guidance are easy to understand
It is also important that the explanations of the options are easy to understand.
The ease of understanding can vary greatly between reading a script as text and listening to it as audio.
We recommend having several people actually call the IVR system to check that they can operate it without any hesitation.
Check if the IVR system (interactive voice response system) settings are correct
Check that the buttons on the phone work correctly when pressed.
- Have you accidentally set a different audio file?
- Are you able to be transferred to a call center operator without any issues?
- Are calls forwarded to the correct destination?
Check that the settings of your IVR system (interactive voice response system) are correct.
It is also important to have call center operators test it in advance to make sure there are no problems .
As such, when introducing telephone voice guidance, it is recommended to test and check the reading voice and IVR system (interactive voice response system) beforehand.
Any issues found during the implementation test should be fixed before going live.
The free text-to-speech app "Ondoku" allows you to quickly generate new voice prompts , making it easy to revise the content of telephone voice guidance .
If you want to add new content to an already implemented telephone voice guidance, we recommend using Ondoku to read the audio for free .
Why not try using the free text-to-speech app "Ondoku" to make your phone voice guidance easier to use?
[Free] Ondoku, the ideal AI service for implementing telephone voice guidance
If you want to create voice guidance reading audio for a call center or telephone help desk, we recommend the AI reading app "Ondoku" !
"Ondoku" is a free AI text-to-speech app.
You can easily create high-quality AI reading voices for free.
Create high-quality AI-powered voices for free
The biggest feature of "Ondoku" is that you can create high-quality AI voice for free !
The free plan can be used for commercial purposes, making it ideal for call centers and corporate telephone helplines (click here for more information on commercial use) .
Another key point is that it can create easy-to-listen voices, which is unique to the latest voice synthesis AI.
Instead of the unnatural voice of previous machines, it reads in an easy-to-listen, natural voice like a professional narrator .
The clear sound quality makes it easy to hear over the phone, so you can introduce easy-to-use telephone voice guidance.
Select the best voice for your telephone voice guidance
With "Ondoku ," you can choose from a wide variety of AI reading voices, including male and female!
For Japanese, you can choose from over 16 different voices.
You can listen to the audio in this article, so please take a look.
You can also adjust the speed and pitch of the audio , so you can create audio that is easier for your customers to understand.
Multilingual support allows you to create audio guidance for foreigners
"Ondoku" is multilingual, supporting over 48 languages including English , Chinese , Korean , Spanish , and French .
- Product repair and consultation call center for foreigners
- Reservation systems for inbound tourists in the tourism industry and accommodations
- Call centers in municipalities with many foreign residents
You can also easily create audio guidance for foreign customers , such as:
You can listen to audio samples in foreign languages in this article, so please take a look.
[Ondoku] Listen to the voices and sample audio for supported languages | Text-to-Speech Software Ondoku
Here we will introduce Ondoku's supported languages and sample audio.
Why not try using "Ondoku" for telephone voice guidance?
In this way, with the AI reading app "Ondoku," you can easily create AI reading voices that are perfect for telephone voice guidance!
If you want to introduce telephone voice guidance, we recommend that you first try out Ondoku 's AI reading voice for free .
Why not create easy-to-listen telephone voice guidance using the latest AI reading app, "Ondoku" ?
Common mistakes and solutions when implementing telephone voice guidance

We will explain common mistakes and how to deal with them when introducing voice guidance to call centers and telephone help desks.
Too many voice prompt options confuse customers
A common mistake with telephone voice guidance is setting up too many options .
1. Regarding products, 2. Regarding repairs, 3. Regarding delivery, 4. Regarding returns, 5. Regarding cancellations, 6. Regarding other inquiries
When you have so many options, it can be hard to know which one to choose.
Additionally, if customers do not have an unlimited calling plan or use a toll-free number, listening to long voice guidance can be very stressful, as calls are charged .
To avoid this, we recommend limiting your initial voice response options to just three or four .
If you find yourself with too many options, it's a good idea to narrow them down step by step .
First, we'll break it down into broad categories, then we'll present more specific options.
However, even in this case, care must be taken not to make the hierarchy too deep .
When creating audio using free text-to-speech software or apps, it is recommended to pay attention to the number and content of options and the depth of hierarchy.
The voice is difficult to hear and the call gets hung up
If the audio quality or speed of the voice prompts is not adequate, customers may hang up the phone.
The key to creating easy-to-listen audio guidance is to use the latest AI services that can read aloud in high-quality audio .
Ondoku is a free AI reading service that reads text in an easy-to-listen voice, just like a professional narrator.
The settings for the text-to-speech app are also important.
If the voice is spoken too quickly, the customer will move on to the next prompt before they can comprehend it.
On the other hand, if it's too slow, it will cause frustration for the customer.
When creating audio with "Ondoku," you can leave it at the default settings , but if you feel the audio is too fast, you can slow down the reading speed .
If the content is not updated after installation, it becomes outdated.
When introducing telephone voice guidance, updating it after implementation is also important.
For example, if business hours change but the audio guidance remains outdated, customers will receive incorrect information.
If the department in charge or the service content changes, the voice guidance will also need to be revised.
If you want to easily update your telephone voice guidance, we recommend using an AI reading app or software.
All you have to do is edit the script text and read it out loud , so you can make corrections immediately if needed.
If you have already implemented telephone voice guidance but the content is outdated, we also recommend using AI reading apps and software to update it.
We recommend a free AI-powered voice guidance app for phone calls.
Advances in AI voice synthesis technology have made it easy for anyone to implement telephone voice guidance .
By using AI text-to-speech software, you can create high-quality audio for voice guidance for free.
It is possible to introduce telephone voice guidance that is easy to use even for small and medium-sized enterprises and sole proprietors.
If you are considering introducing telephone voice guidance, we recommend creating audio files using the AI reading app "Ondoku."
Why not try out the free reading of "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.
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


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