<https://icecreamapps.com/es/learn/Howto/how-to-convert-aiff-to-mp3-es.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://static.icecreamapps.com/es/learn/Howto/how-to-convert-aiff-to-mp3-es.html>