> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://dev.hume.ai/voice/docs/speech-to-speech-evi/guides/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://dev.hume.ai/_mcp/server.

# Guides

## Docs

- [Audio](https://dev.hume.ai/voice/docs/speech-to-speech-evi/guides/audio.md): Guide to recording and playing audio for an EVI chat.
- [Prompt Engineering for EVI](https://dev.hume.ai/voice/docs/speech-to-speech-evi/guides/prompting.md): Guide to crafting system prompts to shape the behavior, responses, and style of the Empathic Voice Interface (EVI).
- [Custom Language Model](https://dev.hume.ai/voice/docs/speech-to-speech-evi/guides/custom-language-model.md): Use a custom language model to generate your own text, for maximum configurability.
- [Control Plane](https://dev.hume.ai/voice/docs/speech-to-speech-evi/guides/control-plane.md): Guide to controlling active EVI chats from a trusted backend, including updating session settings and streaming mirrored events.