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Extend Music

POST 
/api/v1/generate/extend

Extend or modify existing music by creating a continuation based on a source audio track.

Usage Guide​

  • This endpoint allows you to extend existing music tracks
  • You can choose to use original parameters or set new custom parameters
  • Extended music will maintain style consistency with the source track

Parameter Details​

  • With Custom Parameters (defaultParamFlag: true):

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

  • With Original Parameters (defaultParamFlag: false):

    • Only audioId is required
    • Other parameters will be inherited from the source audio

Developer Notes​

  • Generated files are retained for 14 days
  • Model version must match the source audio's model version
  • Callback process follows the same pattern as the music generation endpoint

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",
        "stream_audio_url": "https://example.cn/****",
        "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
      },
      {
        "id": "bd15****1873",
        "audio_url": "https://example.cn/****.mp3",
        "stream_audio_url": "https://example.cn/****",
        "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": 228.28
      }
    ]
  }
}

Callbacks Responses​

Callback received successfully