Web Audio API Library (https://github.com/Korilakkuma/XSound) on Headless Chrome

headless-webaudio.js

'use strict';

const chrome         = require('chrome-remote-interface');
const ChromeLauncher = require('chrome-launcher').Launcher;

function launchChrome() {
  const launcher = new ChromeLauncher();

  return Promise.resolve(launcher);
}

function onPageLoad(Runtime) {
  // https://github.com/Korilakkuma/XSound
  const js = `
    X('oscillator').setup(true);
    X('oscillator').get(0).param('type', 'sawtooth');
    X('oscillator').ready().start(440);
  `;

  return Promise.resolve(Runtime.evaluate({ expression : js }));
}

launchChrome().then(launcher => {
  chrome(protocol => {
    const { Page, Runtime } = protocol;

    Page.enable();

    Page.navigate({ url : 'https://korilakkuma.github.io/XSound/' });

    onPageLoad(Runtime).then(() => {
      protocol.close();
      launcher.kill();
    });
  }).on('error', error => {
    throw Error(error);
  });
});

$ npm init -y
$ npm install --save chrome-remote-interface chrome-launcher
$ alias chrome="/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome" # mac
$ chrome --headless --disable-gpu --remote-debugging-port=9222 &
$ node headless-webaudio.js