TFW when you realize the CD release of Skinny Puppy's "Rabies" was mastered with Dolby B Noise Reduction.
@c1t7 I think they just mastered it with Dolby B turned on so the high end is equalized out. That's how Dolby B worked (amplified the high-end frequencies and then equalized it out in the end).
The CD version I have sounds muffled (which is what you'd get if you applied Dolby B to a signal that didn't have the high-end artificially amplified).
@c1t7 No worries. :)
But Dolby B was an interesting attempt to try to bring fidelity to a medium that wasn't capable of great fidelity. And it also was backward-compatible with non-Dolby decks (which gave the recordings that great treble that folks associate with cassettes).
It's all tricks.