I built RyBot, the voice agent on my portfolio, using Hume's EVI (Empathic Voice Interface) for voice I/O and Claude for intelligence. This combination gives you best-in-class emotion understanding and reasoning in one package.
This article explains why Hume + Claude is such a powerful pairing and what you can build with it.
Why Hume EVI?
Hume's Empathic Voice Interface handles the hard parts of voice AI:
- Speech-to-text - Converts user speech to text in real-time
- Text-to-speech - Natural voice output with customizable voices
- Emotion detection - Analyzes 48 emotions from voice prosody
- Interruption handling - Users can interrupt naturally
- Voice cloning - Create custom voices from samples
You never touch raw audio. Hume abstracts all of that complexity.
Why Claude?
Claude provides the intelligence layer:
- Natural conversation - Responses feel human, not robotic
- Tool use - Execute functions, fetch data, trigger actions
- Context awareness - Understands nuance and maintains conversation flow
- Customizable personality - Define exactly how your agent should behave
The Architecture
The key insight is using a proxy server between Hume and Claude. This gives you full control over the conversation flow.
┌─────────────┐ ┌─────────────┐ ┌─────────────────┐ ┌───────────┐ │ User │ ←──→ │ Hume EVI │ ←──→ │ Proxy Server │ ←──→ │ Claude │ │ (Browser) │ │ (Voice) │ │ (Your Code) │ │ API │ └─────────────┘ └─────────────┘ └─────────────────┘ └───────────┘
Your proxy server can:
- Inject context (user data, memories, current page)
- Execute tools when Claude requests them
- Process emotion data to shape responses
- Log conversations for analytics
- Apply rate limiting and security controls
What Makes It Special
Emotion-aware responses. Hume detects when users are frustrated, excited, confused, or curious. Your agent can adapt its tone accordingly - being more patient when frustration is detected, or matching enthusiasm when excitement is high.
Tool execution. Claude can decide to call functions mid-conversation. Weather lookups, web searches, database queries, UI actions - whatever you wire up.
Memory. Store facts about users across sessions. Your agent remembers names, preferences, and past conversations.
Personality. Voice is fundamentally different from text. Responses need to be shorter, more conversational, and natural-sounding. Claude excels at this with the right prompting.
What You Can Build
With this stack, you can create:
- Portfolio assistants - Like RyBot, answering questions about your work
- Customer support agents - Handle inquiries with empathy
- Interactive tutorials - Voice-guided learning experiences
- Accessibility tools - Voice interfaces for any application
- Companion apps - Agents that remember and grow with users
Getting Started
If you want to build something similar:
- Create a Hume account and explore the EVI playground
- Get an Anthropic API key for Claude
- Set up a simple Node.js server that proxies between them
- Iterate on your system prompt until the personality feels right