The Everyday Assistant
A helpful and professional personal assistant.
Gemini 3.8 Flash Text To Speech — Expressive AI Voice Generator
Bring your words to life with Gemini 3.8 Flash TTS. Explore character voices, direct emotional delivery, and create conversations with a voice for every role. Start with your script and shape the performance you want to hear.
Select Language
English (US)
Speaker settings
Powered by Gemini 3.8 Flash TTS
Fullscreen
What is Gemini 3.8 Flash TTS?
Gemini 3.8 Flash TTS is Google’s text-to-speech model for creative voice production. It combines custom voice creation with detailed performance control. Think of a voiceover as three decisions: who is speaking, what they say, and how the moment should feel. A good recording brings those decisions together around the listener’s needs.
Build a repeatable recording workflow: define the speaker, write the words, and choose how each passage should sound. Keep a clear distinction between the character’s identity and the emotion of a particular line. That distinction matters when a recurring narrator moves between an explanation, a personal story, and a more dramatic scene.
Use this page to explore the sound, prepare a script, and try the current voice studio. Start small, listen carefully, and refine the delivery before making your final recording. Whether you are planning a short product video or a longer story, decide what the audience needs to understand before choosing a more elaborate vocal style.
Key Features of Gemini 3.8 Flash TTS
Custom voice design
Describe vocal character, accent, and cadence, then save a reusable voice. A useful character brief separates lasting qualities from temporary emotions: a low, textured narrator can be reassuring in one passage and worried in the next. Choose the identity first, then direct each performance around the scene.
Flash and Lite language coverage
Gemini 3.8 Flash TTS supports 130 languages; Flash Lite supports 101. The studio currently offers 87 language options in Select Language, which is a smaller selection than the models’ full coverage. For a multilingual project, think about who will hear the recording and which regional delivery fits them. Prepare a short pronunciation sample before a longer script, especially when the text mixes local names, product terms, and another language.
Line-by-line direction
Separate the spoken transcript from per-turn style instructions. This makes a script easier to revise: keep a sentence intact while trying a quieter, warmer, or more urgent delivery. Give each passage a clear emotional intention, and avoid combining several conflicting instructions that make the desired performance difficult to judge.
Two-speaker scenes
Stage dialogue with listener reactions and overlapping backchannels. Plan the exchange as a conversation rather than two unrelated recordings. Give each speaker a distinct role, decide where a response belongs, and listen to the complete scene for clear handoffs. A brief reaction should support the main line without obscuring it.
Vocal sounds and pauses
Use angle-bracket cues for laughter, breathing, and pauses. Place a sound where it has a purpose in the script: a small sigh after difficult news, or a pause before an important reveal. Begin with a restrained version and add texture only when the performance needs it; constant reactions can distract from the words.
Long-form voice consistency
Designed to preserve character timbre and pacing across longer recordings. For an audiobook or extended narration, keep a reference passage for each speaker and review transitions between sections. Consistent delivery still needs editorial attention: chapter openings, dialogue, and reflective passages can require different energy while sharing the same vocal identity.
Hear Gemini 3.8 Flash TTS in Action
Compare a natural reading with emotional takes, explore character voices, and hear a conversation unfold. Choose a category and play a sample to find a direction for your next recording.
Listening roomGemini 3.8 Flash TTS
Emotion & delivery
Natural baseline
Start with the unstyled reading, then compare the directed takes.
Delivery: No added direction
0:00—:—
One voice, one sentence, five deliveries. Switch between takes to hear how energy, pitch, and pacing change the meaning.
Create a voiceover in the studioWhy Choose Gemini 3.8 Flash TTS?
A creative workflow works best when the voice, the words, and the delivery each have a clear purpose.
Build a recognizable character
Write down the qualities that make a speaker distinctive. Keep that brief consistent as you explore different scripts, moods, and scenes. Compare new takes with a reference recording so a character stays recognizable even when the delivery changes.
Make direction easier to revise
Keep the script separate from performance notes. That way you can change the emotion or pacing without rewriting the words your audience will hear. Review one change at a time, and keep the version that best communicates the meaning of the sentence.
Plan the conversation as a scene
Give each speaker a reason to respond. Review the full exchange for rhythm, interruptions, and moments where silence matters as much as speech. A helpful test is whether the scene remains easy to follow without a visual indicator naming the current speaker.
Create a repeatable production process
Save the script and direction together. A small set of reference passages makes it easier to assess future voiceovers against the same creative brief. Record the settings and edits you used so another person can understand how the final take was chosen.
Gemini 3.8 vs 3.1 Flash TTS
Compare voices, language coverage, and the way you direct each performance.
Detailed character performance
Gemini 3.8 Flash TTS
Choose 3.8 for character acting, regional voices, and longer narration or dialogue that needs a consistent vocal identity.
Try Gemini 3.8Familiar expressive workflow
Gemini 3.1 Flash TTS
Use 3.1 to continue an existing preset-voice workflow with natural-language directions, expressive tags, and two-speaker scripts.
Explore Gemini 3.1| Feature | Gemini 3.8 Flash TTS | Gemini 3.1 Flash TTS |
|---|---|---|
| Language coverage | 130 languages, with broader regional accent and dialect support. | 70+ languages, with prompt-based accent and pronunciation control. |
| Voice options | Prebuilt voices, an extended library, and reusable custom voice personas. | 30 prebuilt voices, shaped through audio profiles and delivery instructions. |
| Delivery direction | Separate style instructions for each turn, keeping acting notes out of the spoken script. | Natural-language scene directions and inline tags for tone, pace, and emotion. |
| Expression cues | Angle-bracket cues such as <laugh> and <sigh> for brief sounds; delivery styles stay in Style. | 200+ expressive audio tags, including bracketed cues for emotion, pacing, and pauses. |
| Two-speaker dialogue | Two distinct voices with turn-by-turn direction and improved consistency across longer scenes. | Native two-speaker conversations with speaker profiles and scripted dialogue. |
The studio above offers preset voices. Custom voice design and the extended voice library are model capabilities and are not available in this studio.
Compare both models with the same short script and voice before switching a project. Listen for pronunciation, emotional transitions, and consistency between speakers. When moving to 3.8, put delivery instructions in Style and use Expression for brief sounds and pauses.
How to Prompt Gemini 3.8 Flash TTS
Think in three parts: the speaker’s identity, the delivery, and the spoken words.
01
Voice
Choose a preset voice in Speaker settings. In Composer, assign each block to Speaker 1 or Speaker 2; choose their voices on the right.
02
Style
Use Style Prompt for overall emotion, pacing, and tone in either mode. In Composer, use each block’s Style control for line-specific direction. Keep acting notes out of the spoken transcript.
03
Text
Write the spoken words. Place one-off sounds in <angle brackets> and listener reactions in |pipes|.
One voice. A deliberate change in mood.
This original example starts with reassurance and ends with relief. Keep the character brief stable, then change the direction for each passage.
Use Text for one voice and place delivery notes in Style Prompt. For dialogue, switch to Composer, assign each block to Speaker 1 or Speaker 2, and choose their voices in Speaker settings. Speaker labels typed in Text mode are treated as spoken text.
Read our prompting guideVOICE BRIEF
A mature, warm narrator with a soft low register and clear, unhurried diction.
STYLE
Quiet reassurance at first; a gentle lift in energy as the good news arrives.
TEXT
I checked the message twice. <short pause> The road is open again. <sigh> We can finally go home.
Create a Voiceover in 3 Simple Steps
Use the studio above to turn a first draft into audio you can review and download.
1
Write your script
Sign in, open the studio, and enter the words you want spoken. Start with a short sample so you can evaluate the voice before generating more.
2
Choose the performance
Choose Flash or Flash Lite, then pick a voice and language. Use Text for one voice, or Composer to assign a speaker and delivery style to each speech block.
3
Generate, listen, download
Preview the result, check names and pauses, and adjust the direction if needed. Download the audio when the recording fits your project.
Gemini 3.8 Flash TTS Use Cases
Plan a voice production workflow around the content your audience will actually hear.
Game Characters & NPCs
Write a short character brief before recording. Keep a voice reference for each role so later scenes have a clear creative direction. Test the same character in a greeting, a warning, and a quiet exchange; these reveal whether the voice suits more than a single dramatic line.
Audiobooks & Storytelling
Separate narration from dialogue in your script. Mark the moments that need a change in energy, then review each passage as a listener. Establish how the narrator handles dialogue, descriptions, and scene endings. A chapter should carry the story forward without making every sentence sound equally intense.
Podcasts & Dialogue
Plan the exchange before choosing voices. Short turns and deliberate pauses help the audience follow who is speaking and why. Give the host and guest different conversational habits, and read the scene as a whole. Leave room for a question to land before the answer begins.
Video & Product Voiceovers
Write to the length of your scene. Lead with the message the viewer needs, and leave space for visual details to carry part of the story. Preview the recording against the edit before finalizing it: an effective voiceover complements a demonstration, instead of describing everything already visible on screen.
Multilingual Content
Review names, idioms, and pronunciation for each audience. Prepare a localized script rather than reading a direct translation without context. Check whether dates, numbers, and calls to action sound natural when spoken. Ask a fluent reviewer to assess the finished passage before using it in a public campaign.
Learning & Accessibility
Use short sections and clear sentence boundaries. Let learners pause, replay, and focus on one idea before moving to the next. Explain acronyms before repeating them, and give lists an audible structure. Match the recording to an accurate transcript so readers and listeners can follow the same material.
Your next voiceover starts with a few words.
Choose a voice, give it a direction, and listen to the first take. Refine the performance in the studio until it fits your story.
Frequently Asked Questions About Gemini 3.8 Flash TTS
What is Gemini 3.8 Flash Text To Speech?
It is Google’s speech-generation model for creative voice production. This page introduces its features and gives you an online studio where you can prepare and generate a voiceover.
Which model does the studio on this page use?
The studio uses Gemini 3.8 Flash TTS by default. You can also select Gemini 3.8 Flash Lite TTS. Both models support single-speaker narration and two-speaker dialogue, with playback and downloads when your recording is ready.
How should I prepare a script for the current studio?
Text mode uses one voice: put spoken words in the script field and delivery instructions in Style Prompt. In Composer, use Style Prompt for scene-wide direction, assign a speaker and delivery style to each speech block, and use Expression to insert vocal sounds at the cursor. Choose each speaker’s voice in Speaker settings. Text mode reads your script as written, so do not type speaker labels to switch characters. In Composer, the speaker selector changes the character for a block; Speaker settings controls the voice.
What are the script and style limits?
Keep each generation within 8,000 script characters and use no more than 100 speech blocks in Composer. Each block’s delivery instructions must fit within 2,000 characters. The global Style Prompt has its own 2,000-character instruction limit, including the selected language instruction. When Composer uses only one speaker, the global Style Prompt and all block styles are combined into one set of instructions with a total limit of 2,000 characters. The selected language instruction and automatically added paragraph labels count toward that combined limit, so leave room for them. In Text mode, the 2,000-character instruction limit also includes the selected language instruction. If a limit warning appears, shorten the script or styles, or split the recording into smaller requests.
How many languages do Flash and Flash Lite support?
Gemini 3.8 Flash TTS supports 130 languages, while Gemini 3.8 Flash Lite TTS supports 101. The studio currently provides 87 options in Select Language; the dropdown does not list every language supported by either model. Choose an available language, then preview names, numbers, and regional pronunciation before generating a longer passage.
What are the Gemini 3.8 TTS model names?
The model names are gemini-3.8-flash-tts and gemini-3.8-flash-lite-tts. This page focuses on Flash TTS for creative voice production.
What should I check before downloading a voiceover?
Listen for names, numbers, sentence endings, and pauses. Preview dialogue with each assigned voice, then download the result from the studio. For long scripts, review individual passages before assembling your final recording.
Why can a voiceover sound unnatural even with a good voice?
Writing that looks clear on a page may be difficult to follow aloud. Long sentences, stacked clauses, and repeated emphasis can make a recording feel stiff. Read the script aloud yourself, simplify the phrasing, and remove unnecessary directions. Try a clean baseline before adding more emotion; the strongest performance often comes from a clearer script.
How can a team give useful feedback on a recording?
Comment on a specific passage and describe the intended effect. For example, ask for a calmer opening or a longer pause before the final instruction, rather than saying the whole take needs more energy. Agree on a reference passage, collect pronunciation corrections in one place, and compare revised takes against the same brief.