Insert audio files into slide presentations such as PowerPoint. Recommended software and how to install it

Dec. 13, 2023

Insert audio files into slide presentations such as PowerPoint. Recommended software and how to install it

Hello, this is Ondoku.

Watch this article in video↓

Creating slides and presentations using PowerPoint can be quite difficult.

Slide creators always worry about how to make their slides easy to understand and how to convey their appeal to the audience.

In slides such as PowerPoint, you can make your presentation easier to understand by adding audio in addition to illustrations and photos.


  • I don't have confidence in my own smooth speaking skills.
  • I want to speak in a way that is clear and easy to understand.
  • I want to create a sense of realism by having a variety of speaking voices, such as male and female voices.

In such cases, it is very effective to use text-to-speech software to create narrations for presentations and slides.

This method is attracting a lot of attention in some places, and even Ondoku

“Can I use audio for internal slides?”

We are now receiving inquiries such as:

Ondoku is of course OK for commercial use. (For free plans, please provide credit.)

It can also be used for internal presentations and for reading texts during work.

Click here for more information about commercial use.

Here we will show you how to use text-to-speech software to input audio to make your slides more attractive.

Text-to-speech software that allows you to add audio to slides


There are many other text reading software, but this time I recommend Ondoku .

There are three reasons why I recommend Ondoku.

  • Available for commercial use
  • No software installation required
  • Easy to download audio

That's the point.

If you are using a company computer, there are various hurdles to downloading software from the perspective of protecting company confidentiality.

However, Ondoku is convenient because no installation is required and everything can be completed on the web.

It's also great that downloading audio files is so easy!

Ondoku official website

How to create audio files for slides with Ondoku

computer and notebook

It's actually easy to create audio files that can be included in slides such as PowerPoint.

What to prepare

  • The manuscript you want to read aloud,
  • The slide you want to add audio to,
  • This is Ondoku's website.

First, prepare the manuscript you want to read aloud.

The manuscript can be in PowerPoint notes, or you can prepare it in another software.

Next, copy and paste the manuscript to Ondoku.

If you create audio files for each slide, it will be easier to do later work .

Finally, insert the audio file into the slide.

Insert audio files into PowerPoint

The audio file formats that can be inserted into PowerPoint are wma, wav, mp3, m4a/mp4 (only for PowerPoint 2013 or later), mid/midi, au, and aiff.

From the toolbar

  1. insert
  2. audio
  3. audio on this computer

Please select.

Then, a screen for selecting an audio file will appear, so select the audio file of your choice.

Then a question mark will appear.

Click this icon and set the timing you want it to play.

Changing the start position of an audio file

To choose how your audio file starts, select the drop-down arrow and select an option.

A series of click actions

Click anywhere to automatically play the audio file.


Automatically play audio files when you advance to the slide where you placed them.

When clicked

Plays only when the icon is clicked.

*To choose how to play audio files in your presentation , select one of the following options:

Plays even after switching slides

One audio file will be played for every slide.

repeat until stopped

A single audio file will play repeatedly until you manually stop it by clicking the Play/Pause button.

background play

Audio plays continuously in the background on all slides.

Change playback options

How to change options

  1. Select the ? mark and select the Play tab from the toolbar.
  2. Choose your preferred option.

Option details


You can also trim the audio, and if you want to do so, you can select Trim Audio and use the red and green sliders to trim the audio file to the desired length.

fade out

You can fade audio in or out.
Change the values in each box for [Fade duration].

Volume control

To adjust the volume, select Volume and select your desired setting.

Give a great presentation with good slides!


There are trends in how to create slides, and methods differ depending on the company.

among them,

  • How to convey it attractively
  • Can you make it easy to convey to the other person?

is a very important issue.

I would be very happy if text reading software could help solve this problem even a little.

Please try out the text reading function on the Ondoku website.

You will be surprised at how easy it is to use!

I'm looking forward to seeing you then.

■ 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.
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"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