# Rvc v2

Voice-to-Voice with RVC v2 converts your spoken voice into any RVC v2 trained AI voice while preserving your tone, emotion, and natural delivery.

## API Information

- **Model Slug:** rvc-v2
- **Branded URL:** https://www.eachlabs.ai/rvc-project/rvc/rvc-v2
- **Provider:** RVC Project
- **Category:** Voice to Voice
- **Output Type:** audio
- **Status:** active
- **Base Cost:** $0.0002475 per processing second
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/rvc-v2

## Pricing

- **Charge Type:** dynamic
- **Estimate:** $0.0002475 per processing second
- **Pricing Details:** default: $0.000247

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| input_audio | string | Yes | - | - | Upload your audio file here. |
| rvc_model | string | No | CUSTOM | Obama, Trump, Sandy, Rogan, CUSTOM | An enumeration. |
| custom_rvc_model_download_url | string | No | - | - | URL to download a custom RVC model. If provided, the model will be downloaded (if it doesn't already exist) and used for prediction, regardless of the 'rvc_model' value. |
| pitch_change | number | No | 0 | - | Adjust pitch of AI vocals in semitones. Use positive values to increase pitch, negative to decrease. |
| index_rate | number | No | 0.5 | - | Control how much of the AI's accent to leave in the vocals. |
| filter_radius | integer | No | 3 | - | If >=3: apply median filtering to the harvested pitch results. |
| rms_mix_rate | number | No | 0.25 | - | Control how much to use the original vocal's loudness (0) or a fixed loudness (1). |
| f0_method | string | No | rmvpe | rmvpe, mangio-crepe | An enumeration. |
| crepe_hop_length | integer | No | 128 | - | When f0_method is set to mangio-crepe, this controls how often it checks for pitch changes in milliseconds. |
| protect | number | No | 0.33 | - | Control how much of the original vocals' breath and voiceless consonants to leave in the AI vocals. Set 0.5 to disable. |
| output_format | string | No | wav | mp3, wav | An enumeration. |

## 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": "rvc-v2",
  "input": {
    "input_audio": "https://cdn-us.eachlabs.ai/defaults/73c011b6db352eecc1fdfbc65642fc49c35dbcfb00626716957631b8539607e3.mp3"
  }
}'
```

## Output Schema

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

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated audio)",
  "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

**rvc-v2 — Voice-to-Voice AI Model**

Developed by RVC Project as part of the rvc family, **rvc-v2** is a powerful voice-to-voice AI model that converts your spoken input into any RVC-trained AI voice while preserving tone, emotion, and natural delivery. This makes it ideal for creators and developers seeking **voice-to-voice AI models** that maintain linguistic content and prosody without extensive retraining. Built on a conditional variational autoencoder using HuBERT for content encoding and CREPE for pitch extraction, rvc-v2 excels in high-fidelity voice conversion, delivering outputs with UTMOS perceptual quality scores up to 4.190—outperforming alternatives like kNN-VC in naturalness.

Whether you're cloning voices for content creation or building real-time applications, rvc-v2 from RVC Project handles clean audio inputs seamlessly, supporting use cases like "RVC Project voice-to-voice" transformations that users search for daily.

## 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.