Question 1

How do I create a multi-speaker conversation?

Accepted Answer

Define each voice in the `speakers` list with a unique `speaker_id` (in "Speaker N" format), then reference those IDs in your `dialogue_turns`. The model renders each line in that speaker's assigned voice, accent, style, and pace.

Question 2

Can I control emotion and pacing?

Accepted Answer

Yes. Each speaker has `style` (Vocal Smile, Newscaster, Whisper, Empathetic, Promo/Hype, Deadpan) and `pace` (Natural, Rapid Fire, The Drift, Staccato) settings. You can also embed inline tone tags like [whispers], [shouting], or [determination] directly in the dialogue text.

Question 3

What voices and accents are available?

Accepted Answer

There are 30 prebuilt voices (Zephyr, Fenrir, Puck, Kore, and more) and 8 accents including Neutral, American variants, British (RP), British (Brixton), Transatlantic, and Australian.

Question 4

How is pricing calculated?

Accepted Answer

Pricing is based on the total number of characters across all dialogue turns, at $0.035 per 1,000 characters. You pay per generation with no subscription.

Question 5

What is the maximum length per line?

Accepted Answer

Each dialogue turn's text can be up to 10,000 characters. You can include multiple turns to build longer conversations.

Question 6

What is the difference between the Flash and Pro versions?

Accepted Answer

Gemini 3.1 Flash TTS is optimized for fast, cost-efficient generation, while Gemini 2.5 Pro TTS targets premium studio-quality, high-fidelity output. Both share the same multi-speaker controls.