# Mureka | Region Edit Song | Music Editing

Regenerates a specific time region of a song with new lyrics while keeping the surrounding audio fully intact, seamlessly blending the edited segment back into the original track.

## API Information

- **Model Slug:** mureka-region-edit-song-music-editing
- **Branded URL:** https://www.eachlabs.ai/mureka/mureka/mureka-region-edit-song-music-editing
- **Provider:** Mureka
- **Category:** Text to Voice
- **Output Type:** object
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** $0.10 per execution
- **Estimated Processing Time:** 30 seconds
- **Last Updated:** 2026-08-16
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/mureka-region-edit-song-music-editing

## Pricing

- **Charge Type:** dynamic
- **Estimate:** $0.10 per execution
- **Pricing Details:** default: $0.1

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| lyrics | string | Yes | - | - | Lyrics to rewrite into the selected region. Use square-bracket section tags (e.g. [Bridge], [Verse 2]) for structure. Supports the same 10 languages as song generation. |
| song_id | string | No | - | - | ID of an existing Mureka song returned by POST /v1/song/generate. Mutually exclusive with upload_audio_id. Only songs generated in the last month are supported. |
| upload_audio_id | string | No | - | - | Upload ID returned by POST /v1/files/upload with purpose=audio. Mutually exclusive with song_id. Only last-month uploads are supported. |
| edit_start | integer | Yes | - | 12000–0 | Start of the region to edit, in milliseconds. Must be ≥ 12000 (Mureka requires ≥ 12 s of audio preserved before the edit region). |
| edit_end | integer | Yes | - | 15000–0 | End of the region to edit, in milliseconds. Edited region (edit_end − edit_start) must be ≥ 3000 ms, and ≥ 12 s of audio must remain after edit_end. |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "mureka-region-edit-song-music-editing",
  "input": {
    "lyrics": "[Bridge]\nEvery scar tells a story worth telling",
    "edit_start": 30000,
    "edit_end": 50000
  }
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "object",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "Authorization: Bearer YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `Authorization` bearer token |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**Mureka | Region Edit Song | Music Editing Overview**

The **Mureka | Region Edit Song | Music Editing** model from the Mureka family by provider Mureka enables precise editing of specific time regions in songs. Users can rewrite a targeted segment by providing new lyrics while preserving the surrounding audio intact, solving the challenge of localized music modifications without full regeneration. This **region-specific editing** stands out as the primary differentiator, allowing seamless blends back into the original track via timestamp selection.

Hosted on **each::labs** (eachlabs.ai), it supports both existing song_ids from Mureka's song-generate endpoint or upload_audio_ids from files-upload with purpose=audio. Ideal for music producers needing quick fixes to lyrics or melodies in isolated sections, it delivers professional results with typical runtimes of 20-60 seconds per edit. Access the **Mureka | Region Edit Song | Music Editing API** for integration into workflows.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `Authorization: Bearer YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.