70s Vinyl Copy-Protection
It’s probably not that hard to believe, but I was certainly amused by the fact that in the ’70s, the music industry tried to copy-protect its vinyl offerings by pressing a high-pitch frequency into albums that somehow ruined the “putting it to tape” process. The big problem? The more you listened to a record, the more this analog-rights management degraded: “Repeated plays of vinyl dampen the ability to reproduce high frequencies, and it seems that often the spoiler signal was either audible during regular playback, or didn’t have sufficient impact upon recordings. Either way, after a few plays it was destined to disappear due to regular wear and tear on the record’s groove.” [Currybet, via No Rock And Roll Fun]
