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# Voice Changer

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

Transformeer audio van de ene stem naar de andere. Behoud volledige controle over emotie, timing en voordracht.

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 van de te gebruiken stem. Gebruik het endpoint [Stemmen ophalen](/docs/api-reference/voices/search) om alle beschikbare stemmen weer te geven.

### Query parameters

- `enable_logging` (boolean, optional, default: true) — Wanneer enable_logging is ingesteld op false, wordt voor het request de modus zonder gegevensbewaring gebruikt. Hierdoor zijn geschiedenisfuncties, waaronder request stitching, niet beschikbaar voor dit request. De modus zonder gegevensbewaring is alleen beschikbaar voor Enterprise-klanten.
- `optimize_streaming_latency` (integer, optional, nullable, deprecated) — Je kunt latentieoptimalisaties inschakelen, met enig kwaliteitsverlies als gevolg. De best mogelijke uiteindelijke latentie verschilt per model. Mogelijke waarden: 0 - standaardmodus (geen latentieoptimalisaties) 1 - normale latentieoptimalisaties (ongeveer 50% van de mogelijke latentieverbetering van optie 3) 2 - sterke latentieoptimalisaties (ongeveer 75% van de mogelijke latentieverbetering van optie 3) 3 - maximale latentieoptimalisaties 4 - maximale latentieoptimalisaties, maar ook met de tekstnormalisator uitgeschakeld voor nog meer latentieverbetering (beste latentie, maar kan bijvoorbeeld getallen en datums verkeerd uitspreken). Standaard ingesteld op 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) — Het audiobestand met de inhoud en emotie die de gegenereerde spraak bepalen.
- `model_id` (string, optional) — ID van het model dat wordt gebruikt. Je kunt modellen opvragen met GET /v1/models. Het model moet spraak-naar-spraak ondersteunen; je kunt dit controleren met de eigenschap can_do_voice_conversion.
- `voice_settings` (string, optional) — Steminstellingen die de opgeslagen instellingen voor de opgegeven stem overschrijven. Ze worden alleen toegepast op het opgegeven request. Moet als een JSON-gecodeerde tekenreeks worden verzonden.
- `seed` (integer, optional) — Als dit wordt opgegeven, doet ons systeem zijn best om deterministisch te samplen, zodat herhaalde requests met dezelfde seed en parameters hetzelfde resultaat zouden moeten opleveren. Determinisme is niet gegarandeerd. Moet een geheel getal tussen 0 en 4294967295 zijn.
- `remove_background_noise` (boolean, optional) — Als dit is ingesteld, wordt achtergrondgeluid uit je audio-invoer verwijderd met ons audio-isolatiemodel. Geldt alleen voor Voice Changer.
- `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

Het gegenereerde audiobestand

- File download.

## Errors

### 422 Unprocessable Entity Error

Validatiefout

- `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()
```