Properties
| Name | Type | Description |
|---|---|---|
| cachingEnabled | boolean | This is the flag to toggle voice caching for the assistant. |
| provider | string | This is the voice provider that will be used. |
| voiceId | object | This is the provider-specific ID that will be used. Please note that ash, ballad, coral, sage, and verse may only be used with realtime models. |
| model | string | This is the model that will be used for text-to-speech. |
| instructions | string | This is a prompt that allows you to control the voice of your generated audio. Does not work with 'tts-1' or 'tts-1-hd' models. |
| speed | number | This is the speed multiplier that will be used. |
| chunkPlan | object | This is the plan for chunking the model output before it is sent to the voice provider. |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "#/components/schemas/FallbackOpenAIVoice",
"title": "FallbackOpenAIVoice",
"type": "object",
"properties": {
"cachingEnabled": {
"type": "boolean",
"description": "This is the flag to toggle voice caching for the assistant.",
"example": true,
"default": true
},
"provider": {
"type": "string",
"description": "This is the voice provider that will be used.",
"enum": [
"openai"
]
},
"voiceId": {
"description": "This is the provider-specific ID that will be used.\nPlease note that ash, ballad, coral, sage, and verse may only be used with realtime models.",
"oneOf": [
{
"type": "string",
"enum": [
"alloy",
"echo",
"fable",
"onyx",
"nova",
"shimmer",
"marin",
"cedar"
],
"title": "Preset Voice Options"
},
{
"type": "string",
"title": "OpenAI Voice ID"
}
]
},
"model": {
"type": "string",
"description": "This is the model that will be used for text-to-speech.",
"enum": [
"tts-1",
"tts-1-hd",
"gpt-4o-mini-tts"
]
},
"instructions": {
"type": "string",
"description": "This is a prompt that allows you to control the voice of your generated audio.\nDoes not work with 'tts-1' or 'tts-1-hd' models.",
"maxLength": 10000
},
"speed": {
"type": "number",
"description": "This is the speed multiplier that will be used.",
"minimum": 0.25,
"maximum": 4,
"example": null
},
"chunkPlan": {
"description": "This is the plan for chunking the model output before it is sent to the voice provider.",
"allOf": [
{
"$ref": "#/components/schemas/ChunkPlan"
}
]
}
},
"required": [
"provider",
"voiceId"
]
}
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curl "https://apis.io/api/v1/json-schemas/vapi-fallbackopenaivoice"
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