> ## Documentation Index
> Fetch the complete documentation index at: https://docs.modellix.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Fun-ASR MTL

> [Core Function] Fun-ASR MTL is the multi-language variant for async recorded speech recognition. [Strengths] Same parameters as fun-asr with multi-language tuning. [Best For] Mixed-language or international audio archives. [Limitations] Do NOT send more than one file per request. [Routing] Choose fun-asr for general use; fun-asr-mtl when the source audio is explicitly multi-language.



## OpenAPI

````yaml /model-api/alibaba/alibaba-s2t.json post /alibaba/fun-asr-mtl
openapi: 3.1.0
info:
  title: Alibaba Fun-ASR Speech-to-Text Models API
  description: >-
    Fun-ASR recorded speech recognition on Alibaba. Submit a public audio URL as
    an async task; poll GET /api/v1/tasks/{task_id} until the transcription
    result is ready.
  version: 1.0.0
  contact:
    name: Modellix Support
    email: support@modellix.ai
servers:
  - url: https://api.modellix.ai/api/v1
    description: Alibaba Fun-ASR speech-to-text models.
security:
  - bearerAuth: []
paths:
  /alibaba/fun-asr-mtl:
    post:
      summary: Fun-ASR MTL
      description: >-
        [Core Function] Fun-ASR MTL is the multi-language variant for async
        recorded speech recognition. [Strengths] Same parameters as fun-asr with
        multi-language tuning. [Best For] Mixed-language or international audio
        archives. [Limitations] Do NOT send more than one file per request.
        [Routing] Choose fun-asr for general use; fun-asr-mtl when the source
        audio is explicitly multi-language.
      operationId: funAsrMtlAsync
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FunASRRequest'
      responses:
        '200':
          description: >-
            Task submitted successfully. Poll GET /api/v1/tasks/{task_id} until
            the task completes; the transcription result is returned on the task
            result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncTaskResponse'
              example:
                code: 0
                message: success
                data:
                  status: pending
                  task_id: task-fun-asr-mtl-001
                  model_id: alibaba/fun-asr-mtl
                  get_result:
                    method: GET
                    url: https://api.modellix.ai/api/v1/tasks/task-fun-asr-mtl-001
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  schemas:
    FunASRRequest:
      type: object
      required:
        - file_url
      properties:
        file_url:
          type: string
          minLength: 1
          pattern: ^https?://
          description: Public HTTP/HTTPS URL of the audio file (single file).
        vocabulary_id:
          type: string
          description: Optional hot-word vocabulary ID.
        channel_id:
          type: array
          items:
            type: integer
          default:
            - 0
          description: Audio track indices (0-based).
        special_word_filter:
          type: string
          description: Sensitive word filter configuration string.
        diarization_enabled:
          type: boolean
          default: false
          description: Enable speaker diarization (mono audio; recommended ≤2h).
        speaker_count:
          type: integer
          minimum: 2
          maximum: 100
          description: Expected speaker count; only valid when diarization_enabled is true.
        language_hints:
          type: array
          items:
            type: string
            enum:
              - zh
              - en
              - ja
              - ko
              - vi
              - th
              - id
              - ms
              - tl
              - hi
              - ar
              - fr
              - de
              - es
              - pt
              - ru
              - it
              - nl
              - sv
              - da
              - fi
              - 'no'
              - el
              - pl
              - cs
              - hu
              - ro
              - bg
              - hr
              - sk
          description: >-
            Language hints. When multiple values are provided, only the first is
            used.
    AsyncTaskResponse:
      description: Response object for asynchronous task submission.
      type: object
      required:
        - code
        - message
        - data
      properties:
        code:
          type: integer
          description: Response code, 0 indicates success
          example: 0
        message:
          type: string
          description: Response message
          example: success
        data:
          type: object
          required:
            - status
            - task_id
            - model_id
          description: >-
            Task submission details. Poll GET /api/v1/tasks/{task_id} until
            status is success; the transcription appears in result.resources.
            See Common API: Query Task Result.
          properties:
            status:
              type: string
              enum:
                - pending
                - processing
              description: Initial task status
              example: pending
            task_id:
              type: string
              description: Unique task identifier for polling
              example: task-fun-asr-001
            model_id:
              type: string
              description: Model ID in provider/model format
              example: alibaba/fun-asr
            get_result:
              type: object
              description: >-
                Endpoint to query the task result. See Common API: Query Task
                Result.
              properties:
                method:
                  type: string
                  example: GET
                url:
                  type: string
                  example: https://api.modellix.ai/api/v1/tasks/task-fun-asr-001
  responses:
    BadRequest:
      description: Invalid parameters
    Unauthorized:
      description: Missing or invalid API key
    TooManyRequests:
      description: Rate limited
    InternalServerError:
      description: Internal server error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````