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Gemini 3.1 Flash Tts

Newest audio model from Google introduces granular audio tags that give you precise control to direct AI speech for expressive audio generation.

Input

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The text to convert to speech. Gemini 3.1 Flash TTS supports natural-language prompting for style, pace, accent, and emotional expression — include delivery instructions inline with the text (e.g. 'Say cheerfully: Have a wonderful day!'). Supports expressive audio tags like [sigh], [laughing], [whispering], [short pause] for fine-grained control over delivery. For multi-speaker synthesis, prefix lines with speaker aliases defined in the speakers field (e.g. 'Alice: Hello!\nBob: Hi!').

Additional settings
Tips and requirements

Optional style and delivery instructions prepended to the prompt. Controls expressiveness, accent, pace, tone, and emotional expression using natural language. Use this to separate style control from the text content. Examples: 'Speak warmly and slowly', 'Read this as a dramatic newscast', 'Use a British accent with a cheerful tone', 'Whisper mysteriously'.

Tips and requirements

Voice preset for single-speaker synthesis. 30 distinct voices are available. Ignored when speakers is set. Popular choices: Kore (strong, firm female), Puck (upbeat, lively male), Charon (calm, professional male), Zephyr (bright, clear female), Aoede (warm, melodic female).

Tips and requirements

Language for multilingual synthesis. When set, steers the model to speak in the specified language. If not set, the model auto-detects the language from the text.

Tips and requirements

Controls the randomness of the speech output. Higher values produce more creative and varied delivery, while lower values make the output more predictable and focused.

Tips and requirements

Audio output format. mp3: compressed, small file size (recommended). wav: uncompressed PCM wrapped in WAV (24 kHz, 16-bit mono). ogg_opus: Ogg container with Opus codec, good quality-to-size ratio.

Some published inputs are not in this form.

  • Speakers: This combination of schema types is not supported yet. It is not sent.
Price$0.10 / run

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API code for this input

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How to use Gemini 3.1 Flash Tts

Getting started

Draft narration or spoken messages with separate instructions for tone and pace.

Review your result

Listen for pronunciation, unintended spoken instructions, pauses and clipped endings.

Inputs and settings

Put the spoken text in prompt and delivery direction in style_instructions. Choose voice and language_code for the intended reading.

Select WAV, MP3 or Ogg Opus output. Compare temperature cautiously; this Raywake operation has no speakers configuration for assigning multiple voices.

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