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    "port": 8000,
    "cors_origins": ["*"]
  },
  "audio": {
    "sample_rate_hz": 16000,
    "channels": 1,
    "frame_ms": 20
  },
  "session": {
    "inactivity_timeout_sec": 60
  },
  "agent": {
    "system_prompt": "FastGPT app owns the system prompt when send_system_prompt is false.",
    "greeting": "你好",
    "greeting_mode": "generated"
  },
  "services": {
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      "provider": "openai",
      "api_key": "YOUR_STT_KEY",
      "base_url": "https://api.openai.com/v1",
      "model": "gpt-4o-mini-transcribe",
      "language": "zh"
    },
    "llm": {
      "provider": "fastgpt",
      "api_key": "fastgpt-xxxxx",
      "base_url": "http://localhost:3000",
      "model": "my-voice-app",
      "chat_id": null,
      "variables": {
        "user_name": "访客"
      },
      "detail": false,
      "timeout_sec": 60.0,
      "send_system_prompt": false
    },
    "tts": {
      "provider": "openai",
      "api_key": "YOUR_TTS_KEY",
      "base_url": "https://api.openai.com/v1",
      "model": "gpt-4o-mini-tts",
      "voice": "alloy"
    }
  }
}