Originally Posted by SGD Lutherie
It was also because they were just taking the master tapes that were mastered for vinyl and just transferring them to digital.
That generally resulted in bad sounding CDs because they didn't re-master specifically for CD but the "brick wall" filtering is really known for the harsh high end and upper mid-range. The mix and mastering for vinyl is so different and the record companies incorrectly assumed these would sound good just because it was now on a generally noise-free medium but, in the words of Marty Feldman as Igor, "They were wrong, weren't they?". I was selling audio equipment before/during/after CDs first became available and the negative comments started not long after we got the first Sony units and the second brand became available (I think it was Kyocera), which used different filters. The Sony unit had been designed and was being demo'd two years before it was released, mainly because they couldn't make the optics work properly, from what I heard and IIRC. Kyocera had the benefit of time, because they were able to make sure their version didn't have these issues.