Very interesting. The media tracks may've been em dashed during prod. Spotify seems to use this format "Artist — Album".

I ripped music from both CDs and Internet radio (not Spotify). I remember there were definitely em dashes in those from Internet radio, but I'm not sure whether they also occurred in those from CDs — those filenames probably came from an online DB. Of course the Internet radios might have ripped the music in the same way.