> ## Documentation Index > Fetch the complete documentation index at: https://enterprise-docs.dify.ai/llms.txt > Use this file to discover all available pages before exploring further. # Convert Audio to Text > **Available for**: Chatflow, Workflow, Chatbot, Agent, Text Generator apps. Transcribes an uploaded audio file to text using the app's configured speech-to-text model. ## OpenAPI ````yaml /en/3.11.x/develop/api/openapi_service.json post /audio-to-text openapi: 3.0.1 info: title: Dify Service API description: >- REST API for Dify applications and knowledge bases. Application endpoints authenticate with an app API key; knowledge endpoints authenticate with a dataset API key. version: 1.0.0 servers: - url: https://{api_base_url} description: >- Base URL of the Dify Service API. Replace it with your deployment's API endpoint. variables: api_base_url: default: api.example.com/v1 description: Host and path of the API base URL, without the `https://` prefix. security: - ApiKeyAuth: [] tags: - name: Chat Messages description: Operations related to chat messages and interactions. - name: Files description: File upload and preview operations. - name: End Users description: Operations related to end user information. - name: Feedback description: User feedback operations. - name: Conversations description: Operations related to managing conversations. - name: Audio description: Text-to-Speech and Speech-to-Text operations. - name: Applications description: Operations to retrieve application settings and information. - name: Annotations description: Operations related to managing annotations for direct replies. - name: Human Input description: Endpoints for resuming paused workflows that require human input. - name: Workflow Runs description: Operations for executing and managing workflows. - name: Completion Messages description: Operations related to text generation and completion. - name: Knowledge Bases description: >- Operations for managing knowledge bases, including creation, configuration, and retrieval. - name: Documents description: >- Operations for creating, updating, and managing documents within a knowledge base. - name: Chunks description: Operations for managing document chunks and child chunks. - name: Metadata description: >- Operations for managing knowledge base metadata fields and document metadata values. - name: Tags description: Operations for managing knowledge base tags and tag bindings. - name: Models description: Operations for retrieving available models. - name: Knowledge Pipeline description: >- Operations for managing and running knowledge pipelines, including datasource plugins and pipeline execution. paths: /audio-to-text: post: tags: - Audio summary: Convert Audio to Text description: >- **Available for**: Chatflow, Workflow, Chatbot, Agent, Text Generator apps. Transcribes an uploaded audio file to text using the app's configured speech-to-text model. operationId: audioToText requestBody: required: true content: multipart/form-data: schema: $ref: '#/components/schemas/AudioToTextRequest' responses: '200': description: Successfully converted audio to text. content: application/json: schema: $ref: '#/components/schemas/AudioToTextResponse' examples: audioToTextSuccess: summary: Response Example value: text: >- Hello, I would like to know more about the iPhone 13 Pro Max. '400': description: >- - `app_unavailable` : The app is unavailable or misconfigured. - `invalid_param` : Speech-to-text is not enabled for this app. - `provider_not_support_speech_to_text` : The model provider does not support speech-to-text. - `provider_not_initialize` : No valid model provider credentials are configured. - `completion_request_error` : The speech recognition request failed. content: application/json: examples: app_unavailable: summary: app_unavailable value: status: 400 code: app_unavailable message: App unavailable, please check your app configurations. invalid_param: summary: invalid_param value: status: 400 code: invalid_param message: Speech to text is not enabled provider_not_support_speech_to_text: summary: provider_not_support_speech_to_text value: status: 400 code: provider_not_support_speech_to_text message: Provider not support speech to text. provider_not_initialize: summary: provider_not_initialize value: status: 400 code: provider_not_initialize message: >- No valid model provider credentials found. Please go to Settings -> Model Provider to complete your provider credentials. completion_request_error: summary: completion_request_error value: status: 400 code: completion_request_error message: Completion request failed. '413': description: '`audio_too_large` : The audio file exceeds the `30 MB` size limit.' content: application/json: examples: audio_too_large: summary: audio_too_large value: status: 413 code: audio_too_large message: Audio size larger than 30 mb '415': description: >- `unsupported_audio_type` : The file's MIME type is not one of the accepted audio types (see the `file` field). content: application/json: examples: unsupported_audio_type: summary: unsupported_audio_type value: status: 415 code: unsupported_audio_type message: Audio type not allowed. '500': description: '`internal_server_error` : Internal server error.' content: application/json: examples: internal_server_error: summary: internal_server_error value: status: 500 code: internal_server_error message: >- The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application. x-codeSamples: - lang: bash label: cURL source: |- curl --request POST \ --url 'https://{api_base_url}/audio-to-text' \ --header 'Authorization: Bearer {api_key}' \ --form 'file=@meeting-question.mp3' \ --form 'user={user}' components: schemas: AudioToTextRequest: type: object description: Request body for audio-to-text conversion. required: - file properties: file: type: string format: binary description: >- Audio file to transcribe. Accepted MIME types: `audio/mp3`, `audio/m4a`, `audio/wav`, `audio/amr`, `audio/mpga`. Other types, including the common `audio/mpeg`, are rejected with `unsupported_audio_type`. Maximum size `30 MB`. user: type: string description: >- End-user identifier, defined by your app and unique within it. See [End User Identity](/en/3.11.x/develop/api/guides/end-user-identity). AudioToTextResponse: type: object properties: text: type: string description: Output text from speech recognition. securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API_KEY description: >- Every request authenticates with an API key: `Authorization: Bearer {API_KEY}`. App endpoints take an app API key; knowledge endpoints take a knowledge base API key ([Get Started](/en/3.11.x/develop/api/guides/get-started)). Keep keys server-side; never embed them in client code. Requests with a missing or invalid key fail with HTTP `401` (`unauthorized`). ````