[Free] AI apps are recommended for introducing telephone guidance! Explaining tips for improving call center efficiency.
Jan. 26, 2026

When you call a telephone inquiry desk or a call center, you often hear voice guidance, don't you?
By using voice guidance, you can improve the efficiency of operations in call centers, companies, and stores.
In fact, by using the latest AI, anyone can easily create automated voices for voice guidance!
Automated voices for voice guidance, which used to cost hundreds of thousands of yen, can now be created for free using the latest AI text-to-speech software and apps.
In this article, we will explain in detail how to implement telephone voice guidance, from specific procedures to points of caution.
We will also introduce free AI software/apps and IVR systems (Automated Voice Response Systems).
From those who want to implement new telephone voice guidance to those who want to reduce call center operating costs, why not try making voice guidance audio using this article as a reference?
[Free] Recommended AI Text-to-Speech App for Implementing Telephone Voice Guidance
If you are implementing telephone voice guidance in a call center, Ondoku is recommended!
Ondoku is an AI app that can create automated voices for voice guidance using the latest AI.
Anyone can easily synthesize easy-to-understand audio, just like a professional narrator.
Since the audio is synthesized by AI, you can create voice guidance 24 hours a day, anytime.
Moreover, Ondoku is free!
Commercial use is OK, so you can feel secure when creating voice guidance for companies or organizations (Click here for details on commercial use).
If you want to implement telephone voice guidance in a call center, why not first experience the AI text-to-speech service Ondoku for free?
Create Telephone Voice Guidance for Free! The Flow of Making Automated Voice with Ondoku

Now, let's introduce the flow of creating automated voice for telephone voice guidance for free!
Please use this as a reference when implementing telephone voice guidance.
1. Create a Script Text for Telephone Voice Guidance

First, create the script text.
The key point when writing script text for telephone voice guidance is to provide easy-to-understand options so that customers can use them without getting lost.
It is recommended to limit the options to about 3 or 4.
If there are too many options, there is a high possibility that the customer will hang up before listening to the end.
Example of Telephone Voice Guidance Script for a Call Center
Thank you for calling. This is the Customer Consultation Desk of XX Corporation. Please follow the voice guidance and press a number. For consultations regarding new contracts, press 1. For changes to contract details, press 2. For consultations regarding cancellations, press 3. For other inquiries, press 4.
It is recommended to use a simple structure like this.
Example of Script Text for Recording Calls in a Call Center
When recording calls with call center operators, it is recommended to inform them about the recording via voice guidance.
For example,
Please note that this call is being recorded to improve the quality of our customer service.
By providing guidance like this, you can give customers a sense of security and prevent trouble before it happens.
2. Create Automated Voice for Telephone Voice Guidance with Ondoku
Once the script text for the telephone voice guidance is complete, read it out using Ondoku to create the automated voice.
Open the Ondoku top page.
Paste the script into the text box on the top page.
When reading out the contents of the telephone voice guidance, it is recommended to paste and read it out for each individual guidance segment.
In this example, we will read out the announcement that plays first when a customer calls.

Select the language and voice type.

Ondoku supports multilingual support for over 48 languages.
In the case of Japanese, for example, you can read it out with 16 types of voices, including female, male, and children.
You can listen to audio samples in this article.
In Ondoku, you can also adjust the pitch and reading speed.
*When reading out telephone voice guidance content, the default settings are usually fine.
Now you are ready.

Press "Read" to start creating the voice.
Reading is completed in just a few seconds.
The screen will switch and the audio will be played.

Listen to the content, and if there are no problems, press "Download" to save the file.
Now you have successfully used Ondoku to read out the telephone voice guidance content.
3. Implement the Audio File into the Voice Guidance
Once the audio file is complete, implement the audio file into your IVR system (Automated Voice Response System).
When you save the file from the "Download" displayed on the Ondoku top page, an MP3 file is downloaded.
Also, if you open the "History" page of Ondoku, WAV file download is also possible.

Since many IVR systems (Automated Voice Response Systems) support importing MP3 and WAV files, you can use the files saved from Ondoku as they are.
This completes the flow of reading out telephone voice guidance content with the AI text-to-speech app Ondoku.
As you can see, you can easily create audio files for voice guidance for free, so why not use Ondoku's AI voice when implementing voice guidance?
What are the Features & Benefits of Implementing Telephone Voice Guidance?

Telephone voice guidance has many benefits.
From here, we will explain the basic characteristics of voice guidance and the benefits of implementing it.
What is Telephone Voice Guidance? Recommended for Inquiry Desks and Call Centers
Telephone voice guidance is a system that automatically provides voice guidance for calls made to telephone inquiry desks or call centers of companies and organizations.
It is also called an IVR system (Automated Voice Response System) and is widely used in call centers and corporate reception desks.
When you implement telephone voice guidance, an automated voice announcement first plays when a customer calls.
When the customer presses a phone button according to the voice guidance, the call is transferred to the person or department in charge.
Furthermore, systems have emerged that allow procedures such as:
- Store or facility reservations
- Requests for courier redelivery
using only phone button operations.
As the labor shortage of call center operators becomes more serious, it is attracting more attention than ever as a system that can more efficiently respond to calls from customers.
Benefits of Implementing Telephone Voice Guidance
The biggest benefit of implementing telephone voice guidance is that it can significantly improve the operational efficiency of call centers.
By automating basic guidance and procedures with voice guidance, you can reduce the number of times call center operators have to respond.
Since call center operators can focus only on complex inquiries, you can improve response quality and increase customer satisfaction.
Reducing labor costs is also a key point.
Since it is no longer necessary to hire call center operators just for phone response, labor costs can be greatly reduced.
In addition, being able to automatically handle phone calls outside of business hours and on holidays is a major advantage.
By utilizing AI text-to-speech software and apps, you can implement voice guidance for free.
For future implementation of telephone voice guidance, the AI text-to-speech app Ondoku is recommended.
Why Free AI Apps are Recommended for Implementing Telephone Voice Guidance

When implementing telephone voice guidance, we recommend using free AI text-to-speech apps/software.
With the AI text-to-speech app Ondoku, you can easily create voiceovers for free.
Voiceover is Important in Implementing Telephone Voice Guidance
When creating voice guidance audio, it used to be common to request a recording from a professional narrator.
Requesting a recording from a narrator incurs high costs for audio production.
Moreover, additional recording costs were required every time business hours changed or service contents were updated.
But with AI text-to-speech software and apps, there's no need to worry about that!
By using a free AI text-to-speech app, anyone can generate natural speech simply by entering text.
Since you can create natural speech like a professional narrator for free, all you have to do is implement the audio file into your IVR system (Automated Voice Response System).
Because there is no cost and you can create audio immediately without waiting, the hurdle for implementing telephone voice guidance has been greatly lowered.
Furthermore, free AI text-to-speech apps can be used 24 hours a day, so you can handle sudden corrections to the telephone voice guidance content.
Easily Implement Voice Guidance with Cloud-based IVR Services
Recently, with the spread of cloud-based IVR services, it is no longer necessary to purchase dedicated telephone equipment.
There is no need to implement telephone equipment at a high cost, and voice guidance can be created entirely on the cloud, so there are almost no initial costs.
Since importing MP3 and WAV files is easy with cloud-based IVR services, you can immediately implement audio files created with AI text-to-speech software and apps.
Even Small and Medium-sized Enterprises and Sole Proprietors Can Implement Telephone Voice Guidance
By using AI voiceovers and IVR services, telephone voice guidance can be implemented for free or at a low cost.
Voice guidance, which previously could only be realized by call centers of large corporations, can now be implemented by small and medium-sized enterprises and sole proprietors.
Using free AI text-to-speech apps/software, you can create audio files for voice guidance simply by entering text.
If you want to easily implement telephone voice guidance, AI text-to-speech apps/software are recommended.
Points to Check When Reviewing Voice Guidance Audio

When you have created the voiceover audio for telephone voice guidance, it is recommended to actually listen to and check the audio on the IVR system (Automated Voice Response System).
We will explain the points for checking voiceover audio for call centers and telephone inquiry desks.
Check the Tempo and Pausing of the Telephone Voice Guidance
When you actually play the audio file on an IVR system (Automated Voice Response System), the impression of the tempo of speaking and how pauses are taken may change compared to when you listened to the audio file on a PC.
- I want to take more pauses between sentences
- I want to increase the pause before the selection number
In such cases, just correct the script text and regenerate the voice with the AI text-to-speech app.
With Ondoku, audio can be synthesized in just a few seconds, so you can immediately correct the voice guidance content.
How to correct the pauses in the voice with Ondoku is explained in this article.
Please take a look.
Confirm if the Options in the Telephone Voice Guidance are Easy to Understand
Whether the explanation of the options is easy to understand is also an important point.
There are cases where the ease of understanding changes significantly between when you check the script in text and when you actually hear it as audio.
It is recommended to have multiple people actually call the IVR system and confirm if they can operate it without getting lost.
Check if the IVR System (Automated Voice Response System) Settings are Correct
Check if the operation when a button is pressed on the phone is correct.
- Is the wrong audio file set by mistake?
- Is the call transferred to the call center operator without any problems?
- Is the call transferred to the correct destination?
Confirm that the settings of the IVR system (Automated Voice Response System) are correct.
It is also a point to have the call center operators test it in advance and confirm if there are any problems.
As described above, when implementing telephone voice guidance, it is recommended to test and check the voiceover audio and IVR system (Automated Voice Response System) beforehand.
Any problems found during implementation testing should all be corrected before starting operation.
With the free text-to-speech app Ondoku, new audio can be generated immediately, so you can easily correct the contents of the telephone voice guidance.
When adding new content to already implemented telephone voice guidance, we also recommend free voiceovers with Ondoku.
Why not implement a more user-friendly telephone voice guidance with the free text-to-speech app Ondoku?
[Free] Ondoku: The Best AI Service for Implementing Telephone Voice Guidance
If you are creating voiceover audio for voice guidance for call centers or telephone inquiry desks, the AI text-to-speech app Ondoku is recommended!
Ondoku is an AI text-to-speech app that can be used for free.
You can easily create high-quality AI voiceovers for free.
Create High-Quality AI Voiceovers for Free
The greatest feature of Ondoku is that you can create high-quality AI voices for free!
Since the free plan can be used commercially, it is ideal for call centers and corporate telephone inquiry desks (Click here for details on commercial use).
Another point is that you can create easy-to-hear audio unique to the latest speech synthesis AI.
Instead of unnatural audio like conventional mechanical voices, you can read it out with a natural voice that is as easy to hear as a professional narrator.
Since the sound quality is clear and easy to hear even over the phone, you can implement user-friendly telephone voice guidance.
Select the Best Voice for Telephone Voice Guidance
With Ondoku, you can choose from a wealth of AI voiceovers, including female and male!
In the case of Japanese, you can choose from over 16 types of voices.
You can listen to the voices in this article, so please take a look.
The speed and pitch of the voice can also be adjusted, so you can create even easier-to-hear audio tailored to your customers.
Multilingual Support Allows for Creating Voice Guidance for Foreigners
Ondoku supports multilingual support for over 48 languages, including English, Chinese, Korean, Spanish, and French.
- Product repair and consultation call centers for foreigners
- Reservation systems for inbound tourists in the tourism and accommodation industry
- Call centers for local governments with many foreign residents
You can easily create voice guidance for foreign customers, such as the above.
Foreign language audio samples can be listened to in this article, so please take a look.
[Ondoku] Listen to voice types and sample voices for supported languages | Text-to-speech software Ondoku
Here we will introduce the supported languages and sample voices of Ondoku.
Why Not Implement Telephone Voice Guidance with Ondoku?
As you can see, with the AI text-to-speech app Ondoku, you can easily produce AI voiceovers optimal for telephone voice guidance!
If you want to implement telephone voice guidance, we recommend first experiencing Ondoku's AI voiceovers for free.
Why not make easy-to-hear telephone voice guidance with the latest AI text-to-speech app Ondoku?
Common Failures & Countermeasures in Implementing Telephone Voice Guidance

We will explain common failures and countermeasures when implementing voice guidance in call centers and telephone inquiry desks.
Customers are Confused Because There are Too Many Options in the Voice Guidance
A common failure in telephone voice guidance is setting too many options.
Press 1 for products, 2 for repairs, 3 for shipping, 4 for returns, 5 for cancellations, 6 for other inquiries
If you list many options like this, customers will become confused about which one to choose.
Also, if the customer has not signed up for an all-you-can-eat calling plan or is using a Navi-Dial, call charges will apply, making listening to long voice guidance a major stress.
To prevent this, it is recommended to limit the options for the initial response voice to only 3 or 4.
If you absolutely must have many options, we also recommend narrowing them down in stages.
First, sort by broad categories, and then present more detailed options.
However, even in that case, care must be taken not to make the hierarchy too deep.
When creating audio with free text-to-speech software/apps, it is recommended to pay attention to the number and content of options, and the depth of the hierarchy.
The Audio is Hard to Hear and the Customer Hangs Up
If the sound quality or speed of the voice guidance is not appropriate, customers may hang up in the middle.
The key to making easy-to-hear voice guidance is to use the latest AI services that can read out with high-quality audio.
With the free AI text-to-speech service Ondoku, you can read out with easy-to-hear audio like a professional narrator.
Settings for the text-to-speech app are also important.
If the speed of the voice is too fast, the customer will proceed to the next guidance before they can understand the content.
Conversely, if it is too slow, it will cause stress to the customer.
When making audio with Ondoku, the default settings are fine, but if you feel the voice is too fast, it is also possible to lower the reading speed.
Content Becomes Outdated Because it is Not Updated After Implementation
When implementing telephone voice guidance, updating after implementation is also important.
For example, if business hours change but the voice guidance content remains old, incorrect information will be conveyed to customers.
When you change the department in charge or the service content, correction of the voice guidance is also necessary.
To easily update telephone voice guidance, AI text-to-speech apps/software are recommended.
Since it's OK to just correct the script text and read it out, you can handle it immediately when corrections are necessary.
AI text-to-speech apps/software are also recommended for updating already implemented telephone voice guidance that has become outdated.
Free AI Text-to-Speech Apps are Recommended for Telephone Voice Guidance
With the advancement of AI speech synthesis technology, anyone can now easily implement telephone voice guidance.
By utilizing AI text-to-speech software, you can create high-quality audio for voice guidance for free.
Even small and medium-sized enterprises and sole proprietors can implement user-friendly telephone voice guidance.
If you want to implement telephone voice guidance, we recommend making audio files with the AI text-to-speech app Ondoku.
Why don't you also first experience Ondoku's free voiceovers?
■ 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
