Audio

Replace Section audio

Replace a section of an existing track from t1..t2 with newly generated content.

Category: Music · suno-replace-section

How to use & limits

Replaces a range [start_seconds..end_seconds] of a track with new content.
end_seconds must be greater than start_seconds and within the original duration.
prompt describes the replacement content; style sets the style tags.
Input: source audio URL.

Capabilities

What this model supports, straight from the schema — no pricing, no infrastructure detail.

Capability	Value
`music` Music	Yes
`max_prompt_length` Max prompt length	5000
`source_audio_required` Source audio required	Yes

Parameters

Fields accepted in params (or first-class, where applicable) for POST /generations.

Name	Label	Type	Required	Default	Options	Min / Max	Description
`audio_url`	Source audio URL	url	Required	—	—	—	URL of the source track to edit.
`start_seconds`	Start Seconds	number	Required	—	—	0 – —	Start of the range, in seconds (minimum 0).
`end_seconds`	End Seconds	number	Required	—	—	0 – —	End of the range, in seconds; must be greater than the start.
`style`	Style / genre	text	Optional	—	—	—	Style tags for the replaced section.
`prompt`	Prompt	textarea	Required	—	—	—	Description of the replacement content (lyrics or musical description).

Example request

bash

curl -X POST https://caranguejo.art/api/v1/dev/generations \
  -H "Authorization: Bearer $CK" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "suno-replace-section",
  "prompt": "More energetic chorus with brass.",
  "params": {
    "start_seconds": 30,
    "end_seconds": 45,
    "style": "funk, brass"
  }
}'

javascript

const res = await fetch("https://caranguejo.art/api/v1/dev/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer " + process.env.CK,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "suno-replace-section",
    "prompt": "More energetic chorus with brass.",
    "params": {
      "start_seconds": 30,
      "end_seconds": 45,
      "style": "funk, brass"
    }
  }),
});
const { data } = await res.json();

Example response

json

{
  "id": "9f0c1a7e-…",
  "object": "generation",
  "model": "suno-replace-section",
  "type": "audio",
  "status": "completed",
  "output": {
    "assets": [
      {
        "url": "https://media.caranguejo.art/outputs/example.mp3",
        "type": "audio"
      }
    ]
  }
}

The job's real cost is returned as credits_charged on the completed response — check GET /balance for the account balance.

Common errors for this job type:

`insufficient_credits`	Account balance can't cover the job cost.
`content_policy_violation`	Prompt or media rejected by content policy.
`generation_timeout`	The job exceeded the maximum processing time.
`rate_limited`	Too many requests per minute.
`invalid_input`	A required parameter is missing or outside the model's schema.
`generation_failed`	Generic processing failure.