OpenAIBuiltInVoice

OpenAIBuiltInVoice = "alloy" | "ash" | "ballad" | "coral" | "echo" | "sage" | "shimmer" | "verse" | "marin" | "cedar"

Defined in: packages/realtime-protocol/dist/openai.d.ts:16

Built-in voice names accepted by both OpenAI Realtime output and greeting TTS.

Every member must remain supported by both APIs. Keep this union limited to that intersection so a configured voice cannot succeed on one speech path and fail on the other.