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Xtts Unknown

fal-ai/xtts
Inference
Private
Schema

About

Generate Audio

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/xtts", {
  input: {
    prompt: "How are you doing friends?",
    audio_url: "https://storage.googleapis.com/falserverless/model_tests/whisper/dinner_conversation.mp3"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.
import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

3. Queue#

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("fal-ai/xtts", {
  input: {
    prompt: "How are you doing friends?",
    audio_url: "https://storage.googleapis.com/falserverless/model_tests/whisper/dinner_conversation.mp3"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("fal-ai/xtts", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("fal-ai/xtts", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

The text prompt you would like to convert to speech.

audio_url string* required

URL of the voice file to match

repetition_penalty float

The repetition penalty to use for generation. Defaults to 5.0. Default value: 5

language LanguageEnum

The language to use for generation. Defaults to English. Default value: "English"

Possible enum values: English, Spanish, French, German, Italian, Portuguese, Polish, Turkish, Russian, Dutch, Czech, Arabic, Chinese, Japanese, Hungarian, Korean, Hindi

temperature float

The temperature to use for generation. Higher is more creative. Defaults to 0.75. Default value: 0.75

gpt_cond_len integer

The length of the GPT conditioning. Defaults to 30. Default value: 30

gpt_cond_chunk_len integer

The length of the GPT conditioning chunks. Defaults to 4. Default value: 4

max_ref_length integer

The maximum length of the reference. Defaults to 60. Default value: 60

sample_rate integer

The sample rate of the audio. Defaults to 24000. Default value: 24000

{
  "prompt": "How are you doing friends?",
  "audio_url": "https://storage.googleapis.com/falserverless/model_tests/whisper/dinner_conversation.mp3",
  "repetition_penalty": 5,
  "language": "English",
  "temperature": 0.75,
  "gpt_cond_len": 30,
  "gpt_cond_chunk_len": 4,
  "max_ref_length": 60,
  "sample_rate": 24000
}

Output#

audio_file Image* required

The generated image file info.

{
  "audio_file": {
    "url": "https://url.to/generated/file/z9RV14K95DvU.png",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019,
    "width": 1024,
    "height": 1024
  }
}

Other types#

Image#

url string* required

The URL where the file can be downloaded from.

content_type string* required

The mime type of the file.

file_name string* required

The name of the file. It will be auto-generated if not provided.

file_size integer* required

The size of the file in bytes.

width integer

The width of the image in pixels.

height integer

The height of the image in pixels.