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# Cambiador de Voz

POST https://api.elevenlabs.io/v1/speech-to-speech/{voice_id}
Content-Type: multipart/form-data

Transforma el audio de una voz a otra. Mantén un control total sobre la emoción, el ritmo y la entonación.

Reference: https://elevenlabs.io/docs/api-reference/speech-to-speech/convert

## Servers

- `https://api.elevenlabs.io` (Production, default)
- `https://api.us.elevenlabs.io` (Production US)
- `https://api.eu.residency.elevenlabs.io` (Production EU)
- `https://api.in.residency.elevenlabs.io` (Production India)
- `https://api.sg.residency.elevenlabs.io` (Production Singapore)

## Request

### Path parameters

- `voice_id` (string, required) — ID de la voz que se utilizará. Usa la ruta de API [Obtener voces](/docs/api-reference/voices/search) para mostrar todas las voces disponibles.

### Query parameters

- `enable_logging` (boolean, optional, default: true) — When enable_logging is set to false zero retention mode will be used for the request. This will mean history features are unavailable for this request, including request stitching. Zero retention mode may only be used by enterprise customers.
- `optimize_streaming_latency` (integer, optional, nullable, deprecated) — Puedes activar optimizaciones de latencia a costa de cierta calidad. La mejor latencia final posible varía según el modelo. Valores posibles: 0 - modo predeterminado (sin optimizaciones de latencia) 1 - optimizaciones de latencia normales (aproximadamente el 50 % de la mejora de latencia posible con la opción 3) 2 - optimizaciones de latencia intensas (aproximadamente el 75 % de la mejora de latencia posible con la opción 3) 3 - optimizaciones de latencia máximas 4 - optimizaciones de latencia máximas, pero también con el normalizador de texto desactivado para reducir aún más la latencia (mejor latencia, pero puede pronunciar incorrectamente, por ejemplo, números y fechas). El valor predeterminado es None.
- `output_format` (enum, optional, default: mp3_44100_128) — Output format of the generated audio. Formatted as codec_sample_rate_bitrate. So an mp3 with 22.05kHz sample rate at 32kbs is represented as mp3_22050_32. MP3 with 192kbps bitrate requires you to be subscribed to Creator tier or above. PCM and WAV formats with 44.1kHz sample rate requires you to be subscribed to Pro tier or above. Note that the μ-law format (sometimes written mu-law, often approximated as u-law) is commonly used for Twilio audio inputs.
  - Allowed values: `alaw_8000`, `mp3_22050_32`, `mp3_24000_48`, `mp3_44100_128`, `mp3_44100_192`, `mp3_44100_32`, `mp3_44100_64`, `mp3_44100_96`, `opus_48000_128`, `opus_48000_192`, `opus_48000_32`, `opus_48000_64`, `opus_48000_96`, `pcm_16000`, `pcm_22050`, `pcm_24000`, `pcm_32000`, `pcm_44100`, `pcm_48000`, `pcm_8000`, `ulaw_8000`, `wav_16000`, `wav_22050`, `wav_24000`, `wav_32000`, `wav_44100`, `wav_48000`, `wav_8000`

### Body (multipart/form-data)

This endpoint expects a multipart form containing a file.

- `audio` (file, required) — El archivo de audio que contiene el contenido y la emoción que controlarán la voz generada.
- `model_id` (string, optional) — Identificador del modelo que se utilizará; puedes consultarlos mediante GET /v1/models. El modelo debe admitir voz a voz; puedes comprobarlo mediante la propiedad can_do_voice_conversion.
- `voice_settings` (string, optional) — Ajustes de voz que anulan los ajustes almacenados para la voz indicada. Solo se aplican a la solicitud indicada. Deben enviarse como una cadena codificada en JSON.
- `seed` (integer, optional) — Si se especifica, nuestro sistema hará todo lo posible para realizar el muestreo de forma determinista, de modo que las solicitudes repetidas con la misma semilla y parámetros deberían devolver el mismo resultado. No se garantiza el determinismo. Debe ser un número entero entre 0 y 4294967295.
- `remove_background_noise` (boolean, optional) — Si se establece, eliminará el ruido de fondo de tu entrada de audio mediante nuestro modelo de aislamiento de audio. Solo se aplica al Cambiador de Voz.
- `file_format` (enum, optional) — The format of input audio. Options are 'pcm_s16le_16' or 'other' For `pcm_s16le_16`, the input audio must be 16-bit PCM at a 16kHz sample rate, single channel (mono), and little-endian byte order. Latency will be lower than with passing an encoded waveform.

## Response

### 200

El archivo de audio generado

- File download.

## Errors

### 422 Unprocessable Entity Error

Error de validación

- `detail` (list of ValidationError, optional)

## Types

### ValidationError

- `loc` (list of ValidationErrorLocItems, required)
- `msg` (string, required)
- `type` (string, required)

### ValidationErrorLocItems

## Examples

**Request**

```json
{
  "audio": "<file: <file1>>",
  "model_id": "eleven_multilingual_sts_v2"
}
```

**SDK Code**

```python
import requests

url = "https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb"

querystring = {"output_format":"mp3_44100_128"}

files = { "audio": "open('<file1>', 'rb')" }
payload = {
    "file_format": ,
    "model_id": "eleven_multilingual_sts_v2",
    "remove_background_noise": ,
    "seed": ,
    "voice_settings": 
}
headers = {"xi-api-key": "xi-api-key"}

response = requests.post(url, data=payload, files=files, headers=headers, params=querystring)

print(response.json())
```

```javascript
const url = 'https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128';
const form = new FormData();
form.append('audio', '<file1>');
form.append('file_format', '');
form.append('model_id', 'eleven_multilingual_sts_v2');
form.append('remove_background_noise', '');
form.append('seed', '');
form.append('voice_settings', '');

const options = {method: 'POST', headers: {'xi-api-key': 'xi-api-key'}};

options.body = form;

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio\"; filename=\"<file1>\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file_format\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"model_id\"\r\n\r\neleven_multilingual_sts_v2\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"remove_background_noise\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"seed\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"voice_settings\"\r\n\r\n\r\n-----011000010111000001101001--\r\n")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("xi-api-key", "xi-api-key")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["xi-api-key"] = 'xi-api-key'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio\"; filename=\"<file1>\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file_format\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"model_id\"\r\n\r\neleven_multilingual_sts_v2\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"remove_background_noise\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"seed\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"voice_settings\"\r\n\r\n\r\n-----011000010111000001101001--\r\n"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128")
  .header("xi-api-key", "xi-api-key")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio\"; filename=\"<file1>\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file_format\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"model_id\"\r\n\r\neleven_multilingual_sts_v2\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"remove_background_noise\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"seed\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"voice_settings\"\r\n\r\n\r\n-----011000010111000001101001--\r\n")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128', [
  'multipart' => [
    [
        'name' => 'audio',
        'filename' => '<file1>',
        'contents' => null
    ],
    [
        'name' => 'model_id',
        'contents' => 'eleven_multilingual_sts_v2'
    ]
  ]
  'headers' => [
    'xi-api-key' => 'xi-api-key',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128");
var request = new RestRequest(Method.POST);
request.AddHeader("xi-api-key", "xi-api-key");
request.AddParameter("undefined", "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio\"; filename=\"<file1>\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file_format\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"model_id\"\r\n\r\neleven_multilingual_sts_v2\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"remove_background_noise\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"seed\"\r\n\r\n\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"voice_settings\"\r\n\r\n\r\n-----011000010111000001101001--\r\n", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["xi-api-key": "xi-api-key"]
let parameters = [
  [
    "name": "audio",
    "fileName": "<file1>"
  ],
  [
    "name": "file_format",
    "value": 
  ],
  [
    "name": "model_id",
    "value": "eleven_multilingual_sts_v2"
  ],
  [
    "name": "remove_background_noise",
    "value": 
  ],
  [
    "name": "seed",
    "value": 
  ],
  [
    "name": "voice_settings",
    "value": 
  ]
]

let boundary = "---011000010111000001101001"

var body = ""
var error: NSError? = nil
for param in parameters {
  let paramName = param["name"]!
  body += "--\(boundary)\r\n"
  body += "Content-Disposition:form-data; name=\"\(paramName)\""
  if let filename = param["fileName"] {
    let contentType = param["content-type"]!
    let fileContent = String(contentsOfFile: filename, encoding: String.Encoding.utf8)
    if (error != nil) {
      print(error as Any)
    }
    body += "; filename=\"\(filename)\"\r\n"
    body += "Content-Type: \(contentType)\r\n\r\n"
    body += fileContent
  } else if let paramValue = param["value"] {
    body += "\r\n\r\n\(paramValue)"
  }
}

let request = NSMutableURLRequest(url: NSURL(string: "https://api.elevenlabs.io/v1/speech-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```