OptionalAvatarThe avatar that comes with this voice (the APIName of its persona's preset Video binding on the model's vendor,
which is what realtime.video.avatarId takes), or null/absent when it has none.
The provider-native voice id sent to the model (e.g. echo).
The human label shown in the picker (e.g. Echo).
OptionalPersonaThe persona this voice belongs to (MJ: AI Personas.ID), or null/absent for a voice only the driver declares.
OptionalPreviewThe persona's preview image URL, or null/absent when it has none.
A selectable provider-native voice (dev voice picker): one per persona, or one per voice only the driver declares. Two personas can share an
ID(a voice, and the same voice with a face);PersonaIDtells them apart.