> ## Documentation Index > Fetch the complete documentation index at: https://docs.magnific.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Voiceover > Generate expressive, natural-sounding speech from text with the ElevenLabs v4 model. Direct the performance with inline audio tags in square brackets, such as `[excited]`, `[whispers]`, `[laughs]` or `[pause 1s]`: the model performs them instead of reading them aloud. Up to 10,000 characters per request. **Credits:** charged per started block of 10 characters of `text`. The request is processed asynchronously: the endpoint returns a `task_id` immediately. Retrieve the result by polling `GET /v1/ai/voiceover/elevenlabs-v4/{task-id}` or by providing an optional `webhook_url`. ## OpenAPI ````yaml POST /v1/ai/voiceover/elevenlabs-v4 openapi: 3.0.0 info: description: >- The Magnific API is your gateway to a vast collection of high-quality digital resources for your applications and projects. As a leading platform, it offers a wide range of graphics, including vectors, photos, illustrations, icons, PSD templates, and more, all curated by talented designers from around the world. title: Magnific API version: 1.0.0 servers: - description: B2B API Production V1 url: https://api.magnific.com security: - magnificApiKey: [] paths: /v1/ai/voiceover/elevenlabs-v4: post: tags: - voiceover summary: Voiceover - Generate speech with ElevenLabs v4 description: > Generate expressive, natural-sounding speech from text with the ElevenLabs v4 model. Direct the performance with inline audio tags in square brackets, such as `[excited]`, `[whispers]`, `[laughs]` or `[pause 1s]`: the model performs them instead of reading them aloud. Up to 10,000 characters per request. **Credits:** charged per started block of 10 characters of `text`. The request is processed asynchronously: the endpoint returns a `task_id` immediately. Retrieve the result by polling `GET /v1/ai/voiceover/elevenlabs-v4/{task-id}` or by providing an optional `webhook_url`. operationId: create_voiceover_elevenlabs_v4_task requestBody: content: application/json: examples: basic: summary: Basic voiceover generation value: text: >- [excited] Welcome to Magnific! [pause 0.5s] Let's create something amazing. voice_id: 21m00Tcm4TlvDq8ikWAM with_settings: summary: Voiceover with custom voice settings value: text: '[whispers] This is the quiet part of the story.' voice_id: 21m00Tcm4TlvDq8ikWAM stability: 0 similarity_boost: 0.9 schema: $ref: '#/components/schemas/elevenlabs-v4-request' required: true responses: '200': content: application/json: examples: success - task created: $ref: '#/components/examples/200-task-created' schema: $ref: >- #/components/schemas/get_style_transfer_task_status_200_response description: OK - Task created successfully '400': $ref: '#/components/responses/400-bad-request' '401': $ref: '#/components/responses/401-unauthorized' '500': $ref: '#/components/responses/500-internal-server-error' '503': $ref: '#/components/responses/503-service-unavailable' components: schemas: elevenlabs-v4-request: properties: text: description: > The text to convert to speech, up to 10,000 characters. Supports UTF-8 characters including accented letters and non-Latin scripts. Inline audio tags in square brackets direct the performance instead of being read aloud, e.g. `[excited]`, `[whispers]`, `[laughs]` or `[pause 1s]`. example: >- [excited] Welcome to Magnific! [pause 0.5s] Let's create something amazing. maxLength: 10000 minLength: 1 type: string voice_id: description: >- The unique identifier of the ElevenLabs voice to use for synthesis. You can find voice IDs in the ElevenLabs voice library. example: 21m00Tcm4TlvDq8ikWAM maxLength: 255 minLength: 1 pattern: ^[a-zA-Z0-9_-]+$ type: string stability: default: 0.5 description: >- Controls voice consistency and expressiveness. Lower values produce more expressive, varied delivery; higher values produce more consistent, stable output. example: 0.5 maximum: 1 minimum: 0 type: number similarity_boost: default: 0.75 description: >- Controls how closely the generated voice matches the original voice. Higher values produce closer matching. example: 0.75 maximum: 1 minimum: 0 type: number webhook_url: description: > Optional callback URL that will receive asynchronous notifications whenever the task changes status. The payload sent to this URL is the same as the corresponding GET endpoint response, but without the data field. example: https://www.example.com/webhook format: uri type: string required: - text - voice_id type: object get_style_transfer_task_status_200_response: example: data: generated: - https://openapi-generator.tech - https://openapi-generator.tech task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED properties: data: $ref: '#/components/schemas/task-detail' required: - data type: object task-detail: allOf: - $ref: '#/components/schemas/task' - properties: generated: items: description: URL of the generated image format: uri type: string type: array required: - generated type: object example: generated: - https://openapi-generator.tech - https://openapi-generator.tech task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED inline_object: example: message: message properties: message: type: string type: object inline_object_1: properties: problem: $ref: '#/components/schemas/inline_object_1_problem' type: object inline_object_2: example: message: Internal Server Error properties: message: example: Internal Server Error type: string type: object inline_object_3: example: message: Service Unavailable. Please try again later. properties: message: example: Service Unavailable. Please try again later. type: string type: object task: example: task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED properties: task_id: description: Task identifier format: uuid type: string status: description: Task status enum: - CREATED - IN_PROGRESS - COMPLETED - FAILED type: string required: - status - task_id type: object inline_object_1_problem: properties: message: example: Validation error type: string invalid_params: items: $ref: '#/components/schemas/inline_object_1_problem_invalid_params_inner' type: array required: - invalid_params - message type: object inline_object_1_problem_invalid_params_inner: properties: name: description: Name of the invalid parameter. example: page type: string field: description: Field of the invalid parameter. Mirrors `name`. example: page type: string reason: example: Parameter 'page' must be greater than 0 type: string required: - field - name - reason type: object examples: 200-task-created: summary: Success - Task created value: data: generated: [] task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED responses: 400-bad-request: content: application/json: examples: invalid_page: summary: Parameter 'page' is not valid value: message: Parameter 'page' must be greater than 0 invalid_query: summary: Parameter 'query' is not valid value: message: Parameter 'query' must not be empty invalid_filter: summary: Parameter 'filter' is not valid value: message: Parameter 'filter' is not valid generic_bad_request: summary: Bad Request value: message: Parameter ':attribute' is not valid schema: $ref: '#/components/schemas/inline_object' application/problem+json: examples: invalid_page: summary: Parameter 'page' is not valid value: message: Validation error invalid_params: - field: page reason: Parameter 'page' must be greater than 0 - field: per_page reason: Parameter 'per_page' must be greater than 0 schema: $ref: '#/components/schemas/inline_object_1' description: >- Bad Request - The server could not understand the request due to invalid syntax. 401-unauthorized: content: application/json: examples: invalid_api_key: summary: API key is not valid value: message: Invalid API key missing_api_key: summary: API key is not provided value: message: Missing API key schema: $ref: '#/components/schemas/inline_object' description: >- Unauthorized - The client must authenticate itself to get the requested response. 500-internal-server-error: content: application/json: schema: $ref: '#/components/schemas/inline_object_2' description: >- Internal Server Error - The server has encountered a situation it doesn't know how to handle. 503-service-unavailable: content: application/json: schema: $ref: '#/components/schemas/inline_object_3' description: Service Unavailable securitySchemes: magnificApiKey: description: > Your Magnific API key. Required for authentication. [Learn how to obtain an API key](https://docs.magnific.com/quickstart) in: header name: x-magnific-api-key type: apiKey ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.