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Create an original soundtrack for an uploaded image or video.
The result contains a completed soundtrack with a reusable ID and audio URL.
The client provides a convenient way to interact with the model API.
npm install --save @fal-ai/clientThe @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.
Set FAL_KEY as an environment variable in your runtime.
export FAL_KEY="YOUR_API_KEY"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("mureka/v9/generate/soundtrack", {
input: {},
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);The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.
import { fal } from "@fal-ai/client";
fal.config({
credentials: "YOUR_FAL_KEY"
});When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.
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("mureka/v9/generate/soundtrack", {
input: {},
webhookUrl: "https://optional.webhook.url/for/results",
});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("mureka/v9/generate/soundtrack", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
logs: true,
});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("mureka/v9/generate/soundtrack", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);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.
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.
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.
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);The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).
Read more about file handling in our file upload guide.
image_id stringImage ID returned by /files/upload with purpose='soundtrack'. Provide exactly one of image_id or video_id.
video_id stringVideo ID returned by /files/upload with purpose='soundtrack'. Provide exactly one of image_id or video_id.
prompt stringOptional description of the desired soundtrack style and mood.
audio_start integerStart time of the soundtrack audio in milliseconds. If only audio_start is specified, generation starts there and continues for the video duration, stopping at the end of the song if the remaining audio is shorter. The soundtrack audio segment must be at least 3 seconds long, and a 1-second fade-in is added at the beginning.
audio_end integerEnd time of the soundtrack audio in milliseconds. If both audio_start and audio_end are specified, generation uses those times. If audio_end exceeds the song duration, generation stops at the end of the song. The soundtrack audio segment must be at least 3 seconds long, and a 1-second fade-out is added at the end.
enable_safety_checker booleanAuthorized callers may set false to request relaxed screening. Default value: true
{
"enable_safety_checker": true
}song_id stringReusable identifier for this audio. Pass it to endpoints that accept song_id.
The generated audio file.
duration integerDuration of the generated audio in milliseconds, when available.
Timed lyric sections for the generated audio, when available.
{
"audio": {
"url": "",
"content_type": "image/png",
"file_name": "z9RV14K95DvU.png",
"file_size": 4404019
},
"lyrics_sections": [
{
"lines": [
{
"words": [
{}
]
}
]
}
]
}section_type EnumPossible enum values: intro, verse, pre-chorus, chorus, bridge, break, outro
start integerend integerurl string* requiredThe URL where the file can be downloaded from.
content_type stringThe mime type of the file.
file_name stringThe name of the file. It will be auto-generated if not provided.
file_size integerThe size of the file in bytes.