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Extend Music

POST 
/api/v1/generate/extend

Extend or modify existing music tracks.

Parameter Usage Guide​

  • When defaultParamFlag is true (Custom Parameters):

    • prompt, style, title and continueAt are required
    • prompt length limit: 3000 characters
    • style length limit: 200 characters
    • title length limit: 80 characters

  • When defaultParamFlag is false (Use Default Parameters):

    • Only audioId is required
    • Other parameters will use the original audio's parameters

Developer Notes​

  1. Generated files are retained for 15 days
  2. Model version must be consistent with the source music
  3. This feature is ideal for creating longer compositions by extending existing tracks

Request​

Responses​

Request successful

Callbacks​

POST 
{$request.body#/callBackUrl}

System will call this callback when audio generation is complete.

Callback Example​

{
  "code": 200,
  "msg": "All generated successfully.",
  "data": {
    "callbackType": "complete",
    "task_id": "2fac****9f72",
    "data": [
      {
        "id": "8551****662c",
        "audio_url": "https://example.cn/****.mp3",
        "source_audio_url": "https://example.cn/****.mp3",
        "stream_audio_url": "https://example.cn/****",
        "source_stream_audio_url": "https://example.cn/****",
        "image_url": "https://example.cn/****.jpeg",
        "source_image_url": "https://example.cn/****.jpeg",
        "prompt": "[Verse] Night city lights shining bright",
        "model_name": "chirp-v3-5",
        "title": "Iron Man",
        "tags": "electrifying, rock",
        "createTime": "2025-01-01 00:00:00",
        "duration": 198.44
      }
    ]
  }
}

Callbacks Responses​

Callback received successfully