Pitch Shift
Raise or lower the pitch of an audio file by a number of semitones without changing its playback speed.
API Endpoint
POST /api/v1/tools/pitch-shift
Accepts multipart form data with an audio file and a JSON settings field.
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| semitones | integer | No | 3 | Semitones to shift (-12 to 12). Must be nonzero. |
Example Request
bash
curl -X POST http://localhost:1349/api/v1/tools/pitch-shift \
-H "Authorization: Bearer si_your-api-key" \
-F "[email protected]" \
-F 'settings={"semitones": -5}'Example Response
json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/audio.mp3",
"originalSize": 4500000,
"processedSize": 4500000
}Notes
- Positive values raise the pitch; negative values lower it.
- A shift of 12 semitones equals one octave up; -12 equals one octave down.
- Playback duration stays the same regardless of the shift amount.
- Output format matches the input format.