> ## 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.

# Suno Adjust Speed API Documentation

> Use the Suno adjust-speed API to change a song playback speed from 0.25x to 4x, optionally preserving pitch.

<Note>
  This endpoint costs **3 quota (approx. \$0.03)** per request.
</Note>

Submit the source `music_id`, a `speed_multiplier` from `0.25` to `4`, the `keep_pitch` option, and the output `title`. Save the returned `jobId`, then retrieve the result through [Suno Fetch V2](/api/en/suno/suno_fetch_v2) or the `hookUrl` callback.


## OpenAPI

````yaml openapi/en/suno.json POST /suno/v1/adjust-speed
openapi: 3.1.0
info:
  title: TTAPI API DOCS
  version: 1.0.0
  description: Suno AI Music API
servers:
  - url: https://api.ttapi.io
security: []
paths:
  /suno/v1/adjust-speed:
    post:
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                music_id:
                  type: string
                  description: Source music ID to adjust.
                keep_pitch:
                  type: boolean
                  default: false
                  description: Whether to preserve the original pitch while changing speed.
                speed_multiplier:
                  type: number
                  minimum: 0.25
                  maximum: 4
                  default: 1
                  description: 'Playback speed multiplier. Valid range: 0.25 to 4.'
                title:
                  type: string
                  description: Title for the adjusted output track.
                isStorage:
                  type: boolean
                  default: true
                  description: >-
                    Whether to store the adjusted audio and return a TTAPI CDN
                    URL.
                hookUrl:
                  type: string
                  description: Callback URL for task updates and results.
              required:
                - music_id
                - keep_pitch
                - speed_multiplier
                - title
      responses:
        '200':
          $ref: '#/components/responses/SuccessResponse'
        '400':
          $ref: '#/components/responses/400Response'
        '401':
          $ref: '#/components/responses/401Response'
      security:
        - CustomApiKey: []
components:
  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: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
            required:
              - status
              - message
              - data
    400Response:
      description: Parameter error
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: string
                example: FAILED
              message:
                type: string
              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: >-
        You can obtain your API key from the <a
        href='https://dashboard.ttapi.io' target='_blank'>TTAPI Dashboard</a>.

````