Hi team,
I have been using the Gemini 2.5 Pro preview TTS model with the Achird voice for content narration. Previously, the output was consistent and clear.
In recent builds, there is a noticeable regression:
Sudden volume bumps and pitch jumping at sentence boundaries.
Degraded voice clarity compared to earlier versions.
Is this a known checkpoint issue in the preview model? Are there any recommended prosody/style parameters or stable checkpoints available to eliminate these sentence jumps?
Hello @Rayba ,
We have just launched the new Gemini 3.8 Flash TTS (gemini-3.8-flash-tts) and Gemini 3.8 Flash-Lite TTS (gemini-3.8-flash-lite-tts) models: Google AI Studio.
Could you please test with gemini-3.8-flash-tts and let us know if you are still experiencing the same audio issue?