I Tested Gemini 3.8 Flash Lite TTS (It’s Actually Realistic!)



See Gemini 3.8 Flash Lite in action with a full demonstration of its advanced emotion and expression control capabilities.

This video walks through how the new Gemini 3.8 Flash Lite model handles nuanced TTS tasks. I demonstrate the platform’s two-host, two-voice capability using a relatable scenario to show how the system maintains distinct character tones in real-time. With over 20,000 voices available, the level of fidelity is a significant step forward for developers building applications that require natural-sounding AI voice control.

By testing the limits of this text to speech engine, you can see how expression parameters affect the final output. Whether you are building conversational agents or interactive media, this demo highlights the precision control now possible.

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Try it on LiveKit and let me know what you think: https://cloud.livekit.io/signup?utm_source=youtube&utm_medium=video&utm_campaign=jessehall&utm_content=PmbLRNAlQKo

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⏱️ Timestamps ⏱️

0:00 What Gemini 3.8 Flash-Lite TTS does
0:18 Emotion and expression, chosen per line
1:05 The same haiku, three different moods
1:48 Swapping voices mid-conversation
3:25 My own replicated voice
4:12 Two hosts, two voices, one stream
5:36 Giving the hosts a web search tool
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