Fade Audio

Add fade-in and fade-out effects to the beginning and end of an audio file.

API Endpoint

POST /api/v1/tools/fade-audio

Accepts multipart form data with an audio file and a JSON settings field.

Parameters

Parameter	Type	Required	Default	Description
fadeInS	number	No	1	Fade-in duration in seconds (0 to 30)
fadeOutS	number	No	1	Fade-out duration in seconds (0 to 30)

Example Request

curl -X POST http://localhost:1349/api/v1/tools/fade-audio \
  -H "Authorization: Bearer si_your-api-key" \
  -F "[email protected]" \
  -F 'settings={"fadeInS": 2, "fadeOutS": 3}'

Example Response

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/audio.mp3",
  "originalSize": 4500000,
  "processedSize": 4500000
}

Notes

• Set either value to 0 to skip that fade direction. At least one must be greater than 0.
• The fade duration is clamped to the audio length if it exceeds it.
• Output format matches the input format.