Setting Default Album Art

If you have songs that don't have a specific piece of album art, you can define a default image url using the "default_album_art" key. The value can be set on initialization or through a public method.

Initialization

	Amplitude.init({
		"songs": [...],
		"default_album_art": "/url/to/default.jpg"
	});

Public Set Method

  Amplitude.setDefaultAlbumArt( "/url/to/default.jpg" );