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Stable Audio 2.5 Audio to Audio

fal-ai/stable-audio-25/audio-to-audio
Generate high quality music and sound effects using Stable Audio 2.5 from StabilityAI
Inference
Commercial use
PlaygroundAPI

About

Generate Audio To 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/stable-audio-25/audio-to-audio", {
  input: {
    prompt: "Post rock, guitars, bass, strings, euphoric, up-lifting, moody, flowing, raw, epic",
    audio_url: "https://v3.fal.media/files/panda/1-0iezBUIePBa3Sz5YY5B_tmpy1jyshw9.wav"
  },
  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/stable-audio-25/audio-to-audio", {
  input: {
    prompt: "Post rock, guitars, bass, strings, euphoric, up-lifting, moody, flowing, raw, epic",
    audio_url: "https://v3.fal.media/files/panda/1-0iezBUIePBa3Sz5YY5B_tmpy1jyshw9.wav"
  },
  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/stable-audio-25/audio-to-audio", {
  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/stable-audio-25/audio-to-audio", {
  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 prompt to guide the audio generation

audio_url string* required

The audio clip to transform

strength float

Sometimes referred to as denoising, this parameter controls how much influence the audio_url parameter has on the generated audio. A value of 0 would yield audio that is identical to the input. A value of 1 would be as if you passed in no audio at all. Default value: 0.8

num_inference_steps integer

The number of steps to denoise the audio for Default value: 8

total_seconds integer

The duration of the audio clip to generate. If not provided, it will be set to the duration of the input audio.

guidance_scale integer

How strictly the diffusion process adheres to the prompt text (higher values make your audio closer to your prompt). Default value: 1

seed integer
{
  "prompt": "Post rock, guitars, bass, strings, euphoric, up-lifting, moody, flowing, raw, epic",
  "audio_url": "https://v3.fal.media/files/panda/1-0iezBUIePBa3Sz5YY5B_tmpy1jyshw9.wav",
  "strength": 0.8,
  "num_inference_steps": 8,
  "total_seconds": 45,
  "guidance_scale": 1
}

Output#

audio File* required

The generated audio clip

seed integer* required

The random seed used for generation

{
  "audio": "https://v3.fal.media/files/elephant/bJ-KIfIXsls5-pqSRXRwx_tmpdurmawkp.wav"
}

Other types#

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

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

file_size integer

The size of the file in bytes.

file_data string

File data

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