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

# Music Cover

> Perform Cover editing on source music to generate a new music version



## OpenAPI

````yaml openapi/en/flowmuisc.json POST /flowmusic/v1/cover
openapi: 3.1.0
info:
  title: Flowmusic API DOCS
  version: 1.0.0
  description: >-
    TTAPI Flowmusic API endpoint service, currently integrating the most
    advanced music large models on the market.
servers:
  - url: https://api.ttapi.io
security: []
paths:
  /flowmusic/v1/cover:
    post:
      description: Perform Cover editing on source music to generate a new music version
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CoverRequest'
      responses:
        '200':
          $ref: '#/components/responses/SuccessResponse'
        '400':
          $ref: '#/components/responses/400Response'
        '401':
          $ref: '#/components/responses/401Response'
      security:
        - CustomApiKey: []
components:
  schemas:
    CoverRequest:
      type: object
      properties:
        clip_id:
          type: string
          description: Source music clip_id.
          example: abc123-def456
        model:
          type: string
          description: Music model name; defaults to Lyria 3 Pro when empty.
          default: Lyria 3 Pro
        instruction:
          type: string
          description: Cover editing instruction.
          example: Change this song to jazz style
        strength:
          type: number
          description: Cover strength, range 0 to 1.
          default: 0.5
          minimum: 0
          maximum: 1
        title:
          type: string
          description: Music title after Cover.
        seed:
          type: string
          description: Random seed; used to reproduce or control generation results.
        hook_url:
          type: string
          description: >-
            Business callback URL after task completion; no callback push when
            empty.
      required:
        - clip_id
        - instruction
        - strength
      example:
        clip_id: string
        model: string
        instruction: string
        strength: 0
        title: string
        seed: string
        hook_url: string
  responses:
    SuccessResponse:
      description: Request successful
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                example: SUCCESS
              message:
                type: string
                example: success
              data:
                type: object
                example:
                  jobId: jobId
            required:
              - status
              - message
              - data
    400Response:
      description: Parameter error
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                example: FAILED
              message:
                type: string
                example: '"prompt" cannot be empty.'
              data:
                type: object
            required:
              - status
              - message
    401Response:
      description: Authorization failed
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                example: FAILED
              message:
                type: string
                example: Wrong TT-API-KEY or email is not activated.
            required:
              - status
              - message
  securitySchemes:
    CustomApiKey:
      type: apiKey
      in: header
      name: TT-API-KEY
      description: >-
        Please visit <a href='https://dashboard.ttapi.io' target='_blank'>TTAPI
        Dashboard</a> to obtain your API key.

````