### Answer Based on the available sources, there is some discussion about integrating custom STT and TTS providers with Retell. One community member mentioned a workflow for integrating Reverie's STT and TTS: Audio → Custom STT → LLM → Custom TTS → Retell playback [(1) ]() However, the official documentation I have access to does not provide detailed instructions on how to integrate your own voice engine (custom STT/TTS) with Retell's pipeline. You can also potentially use your custom LLM with Retell and integrate a knowledge base using a RAG setup or OpenAI Assistants API. [(2) ]() For specific guidance on integrating a custom voice engine, I'd recommend: - Check out these potentially useful sources: [Custom Telephony Overview]() , [Documentation]() - Visit [Hire certified Retell partner]() Would you like me to provide a general answer based on broader voice AI knowledge?

​ To learn more, see the sources I considered: [[1] Integrate Reverie STT and TTS for Indic Language Support](https://discord.com/channels/1186424376300679209/1400343548599079043) [[2] Discord message from @dzhn10 on 2024-04-12](https://discord.com/channels/1186424376300679209/1186462578310910112/1228143832391221298) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.