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
• Prompting guide: https://dev.hume.ai/docs/speech-to-speech-evi/guides/prompting
• Privacy controls: https://dev.hume.ai/docs/resources/privacy
• Pricing page: https://www.hume.ai/pricing
• Acceptable Use Policy: https://www.hume.ai/acceptable-use-policy