Get audio duration on Chrome for Android

Question

I'm getting the audio/video duration of a file without appending it to the screen. "Using the same code", when I try to get the video duration on both sides it works as expected. But when using audio files it says that the duration is 0 on Android, but it works on a desktop computer.

// Only working on Desktop
var audio = new Audio(url);

// Hide audio player
// player.appendChild(audio);

audio.addEventListener('loadedmetadata', function() {
  alert(audio.duration);
});

And the below code is working:

// Working on Desktop and Android
var video = document.createElement('video');
video.src = url;

// Hide video
// player.appendChild(video);

video.addEventListener('loadedmetadata', function() {
  alert(video.duration);
});