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POST
Suno Speed
suno-speed changes the speed of one of your tracks, keeping its pitch unless you turn that off. Confirm live rates on the SnapGen models page. Failed tasks are not charged.
string
required
Set to suno-speed.
string
required
The id of your earlier task that holds the source track. It must be your own task, must have succeeded, and must come from a model listed in Source tracks.
integer
default:"1"
Position of the source track in that task’s result.tracks, counting from 1 (up to 8).
number
required
Speed multiplier, from 0.25 to 4. For example, 1.25 plays 25% faster.
boolean
default:"true"
Keeps the original pitch while the speed changes. Set false to let the pitch follow the speed.
string
Title of the new track, up to 80 characters.
string
Optional public https URL that receives one signed event when the task finishes. See Task webhooks.
string
Required with webhook: 16 to 256 characters, used to sign the delivery.

Source tracks

The source task must be your own succeeded task from one of these models: suno-music, suno-inspo, suno-sounds, suno-upload, suno-upload-cover, suno-upload-extend, suno-extend, suno-cover, suno-remaster, suno-add-vocals, suno-add-instrumental, suno-add-stem, suno-replace-section, suno-remove-section, suno-crop, suno-fade-in, suno-fade-out, suno-speed, suno-concat, suno-mashup, suno-sample. Send the task id as source_task_id and pick the track with source_index. Never send provider track or clip IDs. See Reference earlier tasks.

Request

The response is HTTP 202 with a task object and a Location: /v1/tasks/{id} header. Poll GET /v1/tasks/{id} every 10 to 20 seconds until status is succeeded or failed.

Result

result.tracks[] lists every track in its original order, each with its index and audio_url, plus title, image_url, duration_seconds, lyrics, and tags when the provider returns them. result.urls lists the audio URLs.
Result URLs are kept for about 72 hours. Download the files you want to keep. See Music generation tasks for the task lifecycle, result fields, webhooks, and errors.