Interesting topic. I often wonder is it the recording that’s off or my system. Overall bad sound is clearly the recording… occasional etched sound, not so clear. I did a Gemini search on the topic with some interesting results.
Citing earlier discussions: Donald Fagen – The Nightfly: Another early digital masterpiece. It is incredibly precise, but some find the top end to be "dry" or "sterile" to the point of being brittle.
The sound of 1970s recordings is often considered the "Golden Era" of analog tracking, but it was a decade of two distinct halves. The transition from the raw, open sounds of the late 60s to the heavily processed, "dead" studio sounds of the late 70s created a massive variety in how these records interact with a high-end system.
I found this very interesting and can explain the “some” question.
In the 70s, the "Oil Crisis" led to many records being pressed on thinner, recycled vinyl (often called "Regrind"). The Result: This recycled vinyl often has a higher noise floor—a constant low-level "hiss" or "crackle" that wasn't on the master tape. If your system is tuned for maximum detail, it will highlight this surface noise, which can be mistaken for a grainy or "etched" quality in the music itself.

