Improve the clarityof AI-generated speech

Refine pronunciation, pacing, and voice delivery with Cartesia Sonic. Start with your script, adjust the controls, and listen to the result.

Change a setting, then hear the difference

Play the sentence at its default settings. Adjust speed or volume, then generate it again. Keep the words the same while comparing.

The interactive preview lets you edit a sentence and adjust speed and volume before generating it. You can also use these controls in Playground.

Speed and volume are generation guidance. The effect varies with the voice and text, so listen to a representative passage before choosing settings for your project.

Start with what you hear

A pronunciation problem needs a different adjustment from an audio-format mismatch. Change the part of the workflow that causes the problem.

A name sounds wrong

Add a pronunciation dictionary

Use sounds-like guidance or IPA for a recurring word. Listen to it within a complete sentence, not only in isolation.

The sentence feels rushed

Refine punctuation and speed

Shorten a crowded sentence first. If needed, lower the speed setting and compare the same passage again.

The delivery feels flat

Check the voice and script

Choose a voice suited to the language and intended tone. Add emotion guidance when it agrees with the words.

Playback sounds distorted

Check the audio format

Match the player's encoding and sample rate to the generated audio before changing the model settings.

How to improve an AI voice recording

A repeatable listening check helps you choose settings you can use again.

Keep the words fixed

Choose a sentence with the problem you want to fix. Include the names, punctuation, and phrases your audience will hear. Save the first result as your reference.

Change one setting

Keep the script fixed and adjust one setting, such as speed or a dictionary entry. If you compare voices, leave the other controls unchanged.

Listen in the destination

Compare the original generation with the new one through your player or phone connection. Check sentence endings and important words before saving the settings.

Keep the delivery consistent

Save the voice, transcript, and settings together. Reuse the same pronunciation dictionary for recurring names and technical terms across your recordings.

Guide the delivery

Use speed and volume to refine a voice that already suits the script. The controls guide generation, so compare a complete passage rather than expecting an exact change in duration or loudness.

Reuse pronunciations

Give a recurring name or technical term a dictionary entry. Test it in context, then apply that dictionary to later scripts so you can maintain the pronunciation in one place.

Give difficult words a clear pronunciation

Listen to Sonic's pronunciation examples. For names and specialist terms in your own scripts, create a pronunciation dictionary and check each word in a full sentence.

Read the pronunciation guide
  • Pronunciation examples
  • charcuterie

    shar-koo-terie

  • subpoena

    /səˈpiːnə/

  • epinephrine

    /ˌɛpɪˈnɛfrɪn/

Lifelike, expressive voices for every use case

Compare Sonic voices for narration, lessons, and customer conversations. Start with a voice that fits your script, then refine pronunciation and pacing using the same passage.

Support

Turn customer support answers into spoken responses with speech synthesis. Read service updates and troubleshooting steps in a consistent voice across calls and applications.

Gaming

Generate character dialogue from your game's scripts. Compare voices for each role, then listen to new lines in context to check pacing and delivery.

Content

Create voiceovers for videos, tutorials, and product explainers from text. Revise a script and generate new narration without recording each line again.

Media

Turn written articles and stories into spoken audio. Use text-to-speech for podcast introductions or narrated news, checking names and pronunciation before publishing.

Healthcare

Read appointment reminders and patient service information from your team's reviewed text. Use a consistent voice for routine instructions and scheduling updates.

Sales

Add spoken narration to product demonstrations and sales explainers. Test your script in different voices, then update the audio when your product or message changes.

Voice Agents

Give AI voice agents spoken responses generated from your application's text. Choose a voice for greetings and conversations, then test how it sounds across short and longer replies.

Dubbing

Generate speech from translated scripts for your localization workflow. Compare voices in supported languages and review pronunciation and timing before adding the audio to a video.

Avatars

Pair a digital avatar with synthesized speech for presentations and guided experiences. Generate dialogue from text and coordinate audio playback with your avatar's animation.

Logistics

Turn shipment updates and dispatch instructions into spoken messages. Connect speech synthesis to your application so the audio reflects the latest delivery information.

Recruiting

Create spoken interview introductions and candidate scheduling messages from approved scripts. Keep instructions consistent and regenerate the audio when your hiring process changes.

Accessibility

Offer audio versions of written guides, articles, and learning materials. Let people listen to your content and follow along with the original text at their own pace.

Clone a voice to read new scripts

Create a reusable voice from a clean recording with AI voice cloning. Choose source audio with the tone and delivery you want, then test the clone on new scripts before refining the result.

Use your own voice or one you have permission to clone. Compare the original recording and its clone, then test your script to hear how the voice handles tone, accent, and pronunciation.

Explore AI voice cloning

Fluent and native, worldwide

Generate speech from text in 44 languages with Sonic. Listen to language and accent samples for multilingual voiceovers, narrated lessons, and localized videos. Review translated scripts and pronunciation before publishing.

Most popular locales

AI voice enhancement FAQs

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