HeyGenVoiceSettings

HeyGen voice settings

Usage profiles

Usage	Fields and validation
In requests	View fields

In requests

API JSON uses JSON field names (camelCase).

Field	Type	Presence	Meaning
voiceId	string	Optional	Provider voice identifier used for speech synthesis.
rate	number (double) or string (NaN, Infinity, -Infinity)	Optional	Speech-rate setting passed to the HeyGen voice provider.
emotion	string	Optional	Emotion setting passed to HeyGen voice synthesis.
elevenlabsSettings	HeyGenElevenLabsSettings	Optional	ElevenLabs synthesis settings associated with the HeyGen voice.

Where used

Reference	Relationship
Create a voice session (in progress)	POST /api/v1/llm/create-daily-session
HeyGenConfig	Nested in model

Download the public reference contract.

• conversations OpenAPI

Document: DOC-API-MODEL-hey-gen-voice-settings.