Gemini 3.8 text-to-speech lets developers design and clone custom voices

Google DeepMind's latest Gemini Audio models let developers design new vocal personas from natural language prompts, directing pacing, back channeling, and dialect shifts line by line. Developers can also recreate consistent adult voice profiles from a 30-second audio sample, with built-in consent verification, SynthID watermarking, and C2PA credentials.