We gained a lot when albums went fully digital, but we also lost a bunch of stuff along the way. Among the things we lost: Record sleeves, media towers, and Tower Records. We have digital equivalents of all these things, so it’s not like we necessarily miss them. But perhaps the one thing we lost that we’ll never get back is the hidden track. It was one of the few things about an album that couldn’t easily be converted to MP3 or Spotify. … Today’s Tedium analyzes the artform of the hidden track.”