工具：Gemini 3.8 TTS Playground
该 API 的一个突出能力是：可轻松定义多个角色参与的完整对话，每个角色可分配不同的语音和语音风格指令。
原始摘录
A notable feature of the API is that it makes it easy to define a full conversation between multiple characters, each with different voices and voice style instructions.