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POST
Referencing a source track: Operations based on an existing song require no upstream ids—just pass task_id (our task_id of the job that produced the source track) + audio_index (which track in the result music[], 1-based, defaults to 1).
This endpoint has no version dimension: do not pass version — if passed, it is discarded and does not affect billing.

Authorizations

Authorization
string
required
All endpoints require authentication using a Bearer TokenGet an API Key:Visit the API Key management page to get your API KeyAdd the following to the request headers when using it:

Body

model
string
default:"suno"
Audio model. Currently pass suno (defaults to suno if omitted).
task_id
string
required
Our task_id of the job that produced the source track. If missing or the source cannot be resolved, a 400 is returned at submission time.
audio_index
integer
default:"1"
Which track in the source job’s result data.music[] (1-based; defaults to 1; a single generation usually produces 2 tracks: indexes 1 and 2).
speed
number
required
Speed multiplier, range 0.254, e.g. 1.25 (maps to the upstream speed_multiplier). Missing or out-of-range values return 400 directly at submission time.
keep_pitch
boolean
default:"true"
Whether to keep the original pitch when changing speed (defaults to true).
title
string
default:"Untitled"
Title (defaults to Untitled).
Getting the result: This endpoint is an async task. After submitting you get a task_id; poll GET /v1/music/tasks/{task_id} at 3–5s intervals until status is completed or failed (typically takes 30–120s; while generating, status is pending and progress goes queued 10 → ready 50 → done 100). On completion take the processed audio_url from data.result.music[]. On failure data.error.message gives the reason and the pre-deducted quota is automatically refunded.

Response

code
integer
Response status code
data
array
Returned data array