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hume-evi

Build production realtime voice agents with Hume's Empathic Voice Interface (EVI): speech-to-speech sessions, empathic/prosodic response design, EVI 3 versus EVI 4-mini selection, WebSocket and SDK integration, tools/function calling, interruption/barge-in, turn-taking, transcripts/audio artifacts, pricing/limits, privacy, safety, consent, and QA.

skills/providers/voice-agents/hume-evi/SKILL.md

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# Hume EVI production guide

Use this skill when the task is to design, implement, troubleshoot, or review a Hume Empathic Voice Interface (EVI) realtime voice agent. Do not use it for offline-only Hume Text-to-Speech/Octave work unless the user is explicitly configuring EVI voices or comparing EVI to TTS.

Hume's EVI is a realtime speech-to-speech agent interface. It streams user audio, measures expressive vocal modulation, generates a language response, and produces expressive assistant speech. Treat it as a live conversation system, not as a batch transcription or batch TTS API. Documented facts below were verified on 2026-07-10 unless a source date is explicitly noted.

Primary official sources:

- Hume EVI overview: https://dev.hume.ai/docs/speech-to-speech-evi/overview
- EVI version guide: https://dev.hume.ai/docs/speech-to-speech-evi/configuration/evi-version
- Configuration guide: https://dev.hume.ai/docs/speech-to-speech-evi/configuration/build-a-configuration
- Chat WebSocket API reference: https://dev.hume.ai/reference/speech-to-speech-evi/chat
- Audio guide: https://dev.hume.ai/docs/speech-to-speech-evi/guides/audio
- Tool use guide: https://dev.hume.ai/docs/speech-to-speech-evi/features/tool-use
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