Added Speech-to-Text configuration and testing infrastructure:
## STT Engines Configured
- ✅ Whisper.cpp (local, offline) - base model downloaded (142MB)
- ✅ OpenAI Whisper API - configured with existing API key
- ✅ Google Speech-to-Text - configured with existing API key
- ⚠️ Azure STT - optional (not configured)
- ⚠️ Deepgram - optional (not configured)
## New Files
- `docs/STT_SETUP.md` - Complete Windows STT setup guide
- `test_stt_live.cpp` - Test tool for all 5 STT engines
- `create_test_audio_simple.py` - Generate test audio (440Hz tone, 16kHz WAV)
- `create_test_audio.py` - Generate speech audio (requires gtts)
- `models/ggml-base.bin` - Whisper.cpp base model (gitignored)
- `test_audio.wav` - Generated test audio (gitignored)
## Documentation
- Complete setup guide for all STT engines
- API key configuration instructions
- Model download links and recommendations
- Troubleshooting section
- Cost comparison for cloud APIs
## Next Steps
- Compile test_stt_live.cpp to validate all engines
- Test with real audio input
- Integrate into VoiceModule via pub/sub
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
