Ondoku | How to Use SSML Tags with Its New AI Voice: Examples Included

Nov. 12, 2026

Ondoku | How to Use SSML Tags with Its New AI Voice: Examples Included

Thank you for always using Ondoku.

We’re excited to introduce OndokuBeta, a new AI voice that can read aloud “more naturally” and “more like a human”!

With Ondoku’s new AI voices, you can now describe reading styles freely and express a wide range of things, including emotions, acting, age, and dialects!

And there’s more!

Depending on the voice, the new AI voices also support “SSML tags.”

This article introduces examples of how to use SSML tags.

Why not try out different ways of expressing yourself with the new AI voices?

Examples of using SSML tags with the new AI voice OndokuBeta

With OndokuBeta, you can use SSML tags such as these.

All sample audio uses “Ellis.”

<prosody rate="〇〇"> tag | SSML tag for adjusting reading speed

You can use the <prosody rate="〇〇"> tag to adjust reading speed with SSML.

  • <prosody rate="slow">: Speaks slowly.
  • <prosody rate="fast">: Speaks quickly.

Reading style: “Bright and energetic”

<prosody rate="slow">This is important, so I’ll explain it slowly.</prosody><prosody rate="fast">We’re short on time, so I’ll explain it quickly.</prosody>For comparison, I’ll explain it at a normal speed.

<prosody pitch="〇〇"> | SSML tag for adjusting voice pitch

You can use the <prosody pitch="〇〇"> tag to adjust the pitch of the voice with SSML.

  • <prosody pitch="+2st">: Reads aloud in a higher voice (you can change the number).
  • <prosody pitch="-3st">: Reads aloud in a lower voice (you can change the number).

Reading style: “Bright and energetic”

<prosody pitch="+2st">I’ll speak brightly in a slightly higher voice.</prosody><prosody pitch="-3st">Conversely, I’ll speak calmly in a slightly lower voice.</prosody>Finally, I’ll speak at my normal pitch.

<emphasis level="〇〇"> | SSML tag for emphasizing a specified section

You can use the <emphasis level="〇〇"> tag to emphasize a specified section with SSML.

  • <emphasis level="strong">: Emphasizes the specified section.
  • <emphasis level="moderate">: Emphasizes the specified section less strongly than <emphasis level="strong">.

Reading style: “Business”

This item is <emphasis level="moderate">important</emphasis>, but the next item is <emphasis level="strong">even more important</emphasis>.

<say-as interpret-as="digits"> | SSML tag for reading numbers digit by digit

You can use the <say-as interpret-as="digits"> tag to read 1234 digit by digit as “one two three four” instead of “one thousand two hundred thirty-four.”

Reading style: “Bright and energetic”

The contact number is <say-as interpret-as="digits">03 1234 5678</say-as>.

The <break time="○○ms"/> tag cannot be used

The <break time="○○ms"/> tag, which creates pauses (periods of silence) in audio, is not supported by the new AI voices.

Furthermore, it can cause all text after the tag to be skipped and disappear, so please do not enter <break time="○○ms"/>.

You also cannot add pauses by entering lots of punctuation marks, such as “....,” inserting multiple line breaks, or writing something like “(3-second pause).”

Please use video or audio editing software.

Note: With the traditional voices, you can still add pauses using the SSML <break> tag, as before.

Related articles on using SSML tags and reading styles

For details on the SSML tags available with the original Ondoku, see this article.

Be sure to check it out as well.

This article also provides a detailed introduction to examples of using reading styles with the new AI voices.

They allow even more nuanced expression than SSML tags, including emotions, personality, age, and dialects. Why not listen and try them out for yourself?

Why not try using SSML tags with the new AI text-to-speech voices?

With OndokuBeta, AI voices that can read more naturally and sound more human, you can use SSML tags to achieve a wider range of expression.

Why not try the new AI text-to-speech voices for free?

■ AI voice synthesis software "Ondoku"

"Ondoku" is an online text-to-speech tool that can be used with no initial costs.

  • Supports 81 languages and regions, 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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