Download audio from Suno, Udio, and other AI music sites

import { writeFile } from "node:fs/promises";

const API_URL = "https://api.neuralanalog.com";
const API_KEY = process.env.NEURALANALOG_API_KEY;

async function waitForCompletion(objectType, objectId) {
  while (true) {
    const response = await fetch(`${API_URL}/status/${objectType}/${objectId}`, {
      headers: { "X-API-Key": API_KEY },
    });
    if (!response.ok) {
      throw new Error(`Status check failed with ${response.status}`);
    }

    const status = await response.json();
    if (status.is_failed) {
      throw new Error(status.error_message || `${objectType} processing failed`);
    }
    if (status.is_complete) {
      return status;
    }
    await new Promise((resolve) => setTimeout(resolve, 5000));
  }
}

const requestResponse = await fetch(`${API_URL}/from-link`, {
  method: "POST",
  headers: {
    "X-API-Key": API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
  "url": "https://suno.com/song/example"
}),
});
if (!requestResponse.ok) {
  throw new Error(`Import failed with ${requestResponse.status}`);
}

const result = await requestResponse.json();
const jobId = result["audio_id"];
const status = await waitForCompletion("audio", jobId);

const downloadResponse = await fetch(
  `${API_URL}/download/audio/${jobId}`,
  { headers: { "X-API-Key": API_KEY }, redirect: "follow" },
);
if (!downloadResponse.ok) {
  throw new Error(`Download failed with ${downloadResponse.status}`);
}
await writeFile("original.wav", Buffer.from(await downloadResponse.arrayBuffer()));