feat(ai): 질문 TTS를 Gemini TTS로 — 한국어 음성 합성 (기존 GEMINI_API_KEY 재사용)#74
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기존 OpenAI TTS 경로는 OPENAI_API_KEY 가 없어 mock("MOCK..." 스텁)만
생성됐고, Deepgram TTS(Aura-2)는 한국어 미지원(de/en/es/fr/it/ja/nl).
이미 설정된 GEMINI_API_KEY 로 Gemini TTS 를 붙여 한국어 질문을 음성화.
- GeminiTtsProvider: generateContent(responseModalities=AUDIO) 호출,
raw PCM(L16/24kHz)을 WAV 로 감싸 audio/wav 반환. 한국어 합성 실측 검증
(RIFF, 24kHz mono, ~4.3s).
- factory: TTS_PROVIDER=auto 시 GEMINI_API_KEY > OPENAI_API_KEY 순 선택
→ 현재 env(GEMINI 키 보유)에서 자동으로 gemini 선택(env 변경 불요).
- tts_consumer: 저장 키 확장자를 content_type 기준으로 결정(WAV→.wav).
Core 오디오 프록시가 확장자로 content-type 판정.
- settings/.env.example/CLAUDE.md 갱신, 테스트 추가.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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기존 OpenAI TTS 경로는 OPENAI_API_KEY 가 없어 mock("MOCK..." 스텁)만 생성됐고, Deepgram TTS(Aura-2)는 한국어 미지원(de/en/es/fr/it/ja/nl). 이미 설정된 GEMINI_API_KEY 로 Gemini TTS 를 붙여 한국어 질문을 음성화.
변경 사항