SapinSapin TTS WebSocket demo

  endpoint   /tts
  request    {"text": "..."}  (optional: lang, voice)
  audio      PCM S16LE, 16000 Hz, mono, no WAV header, 3200-byte frames
  terminal   {"type":"end"}  or  {"type":"error","message":"..."}
  max text   500 characters
  languages  {"fil": {"name": "Filipino", "voices": [{"id": "FIL_0003", "gender": "female"}, {"id": "FIL_0000", "gender": "female"}]}, "ceb": {"name": "Cebuano", "voices": [{"id": "CEB_0200", "gender": "male"}, {"id": "CEB_0288", "gender": "male"}]}, "hil": {"name": "Hiligaynon", "voices": [{"id": "HIL_0624", "gender": "female"}, {"id": "HIL_0619", "gender": "male"}]}}
  ready      True

See docs/AGORA_INTEGRATION.md in this repo.