<https://www.head-fi.org/threads/hi-there-youtube-music-dac-mobile-amp-question.940673/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.head-fi.org/threads/hi-there-youtube-music-dac-mobile-amp-question.940673/#post-15827776>