1. APIキー: 2. モデル選択: Gemini 3.1 Flash TTS Preview (最新・高速音声生成) Gemini 2.5 Pro TTS Preview (高品質) Gemini 2.5 Flash TTS Preview (軽量・高速) Gemini 3.5 Live Translate Preview (リアルタイム翻訳用) 3. 声の種類: Zephyr (Bright) Puck (Upbeat) Charon (Informative) Kore (Firm) Fenrir (Excitable) Leda (Youthful) Orus (Firm) Aoede (Breezy) Callirrhoe (Easy-going) Autonoe (Bright) Enceladus (Breathy) Iapetus (Clear) Umbriel (Easy-going) Algieba (Smooth) Despina (Smooth) Erinome (Clear) Algenib (Gravelly) Rasalgethi (Informative) Laomedeia (Upbeat) Achernar (Soft) Alnilam (Firm) Schedar (Even) Gacrux (Mature) Pulcherrima (Forward) Achird (Friendly) Zubenelgenubi (Casual) Vindemiatrix (Gentle) Sadachbita (Lively) Sadaltager (Knowledgeable) Sulafat (Warm)