Question 1

What can I make with Gemini 3.8 Flash TTS?

Accepted Answer

Any spoken audio that starts as a script. Narrate an audiobook chapter or a course module. Voice a YouTube video, an explainer, or a product demo. Read the same ad in three voices and keep the best take. Each run returns a WAV file you can drop into Premiere Pro, DaVinci Resolve, Final Cut Pro, CapCut, or any audio editor.

Question 2

Should I pick Gemini 3.8 Flash TTS or Flash-Lite TTS?

Accepted Answer

Start with Flash TTS for anything a listener sits through, like an audiobook, a long narration, or a voiceover with real emotion. Google built it for studio-grade voices and harder pronunciation, and it speaks more languages. Pick Flash-Lite TTS for many short lines, read-aloud features, or a first draft, where speed and cost matter more. It costs about a third less. Both use the same 30 voices and read up to 10,000 characters per run, so you can switch and keep the voice.

Question 3

How do I add a laugh, a sigh, or a pause?

Accepted Answer

Write a short tag in angle brackets where it should happen, like , , , , or . The voice acts it out instead of reading the tag aloud. Write the tags in English, even when the script is in another language. Punctuation shapes the rhythm too, so a comma, an ellipsis, or a full stop changes the pace of the read.

Question 4

Which voices can I use, and can I clone my own voice?

Accepted Answer

Pick from 30 Google voices, each with a one-word character. Kore, the default, is firm. Puck is upbeat, Charon is informative, Sulafat is warm, and Algenib is gravelly. Voice cloning and custom voices are not available, so a recording of a real voice cannot be used. For a voice of your own, design one in ElevenLabs Voice Design and speak with it in ElevenLabs Text to Speech.

Question 5

Which languages does it speak?

Accepted Answer

Google says Gemini 3.8 Flash TTS speaks over 130 languages and detects the language of your text on its own. Write the script in the language you want to hear, and the voice reads it in that language. Try two or three voices for a new language and keep the one that sounds most natural. Flash-Lite TTS covers over 100 languages, so Flash TTS is the better pick for a less common one.

Question 6

How long can my text be?

Accepted Answer

Up to 10,000 characters per run, spaces and tags included. As a rough guide, 1,000 characters make about a minute of speech. For a longer piece, like a full audiobook chapter, split the script at paragraph breaks and generate each part with the same voice. If the text is too long, Visual Sandbox tells you before it charges anything.

Question 7

How do I fix a word it pronounces wrong?

Accepted Answer

Spell it the way it sounds. A name like Siobhan reads better as Shiv-awn. Write numbers, dates, and abbreviations as words when the exact reading matters. A single line costs very little, so test a tricky line on its own before you voice the whole script.

Question 8

How is it different from ElevenLabs Text to Speech?

Accepted Answer

Both turn a script into speech. Gemini 3.8 Flash TTS costs much less per character, speaks more languages, and returns a WAV file. ElevenLabs Text to Speech returns an MP3, follows audio tags in square brackets like [whispers], and can speak in a voice you designed with ElevenLabs Voice Design. Pick Gemini for long scripts, many languages, or a tight budget. Pick ElevenLabs when you need a voice of your own.

Question 9

How much does Gemini 3.8 Flash TTS cost?

Accepted Answer

Pricing is billed per character of your text, so a one-line test costs a fraction of a full script. Spaces and tags count as characters. Flash-Lite TTS costs about a third less. Visual Sandbox shows the exact price before you generate. There is no subscription and no monthly character quota.

Question 10

Can I use the audio commercially?

Accepted Answer

Yes. Google does not claim ownership of the speech you generate, so you can use it in videos, ads, podcasts, audiobooks, apps, and client work. You are responsible for the script and the final use. Some platforms ask you to label AI-generated voices, so check the rules where you publish.

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