If I were to generalize based upon my experience, Classical and Jazz recordings from the 50s up to 1980 are generally superb. I don't have a lot; but friends of mine that were deep into classical and another into Jazz had some outstanding mono recordings from the 50s. Some early Muddy Waters will keep you pinned to your seat. After 1980 digital mastering became popular. I have a few classical recordings that were made from digits. They sound pretty good until you put on an older analog recording and then the space opens up.
To me, the Beatles White Album (serialized pressings) from the 60s sounds really good; but in general, it seems rock from the 70s just never got to the level of Jazz recordings with some exceptions like Heart, Pink Floyd and Eric Clapton. He rocks. There are others too but I will still listen to many lower grade pressings for the music. I like ELP's early records but I swear at times I'm about ready to put a penny on my headshell. (Gasp!)
To me, the Beatles White Album (serialized pressings) from the 60s sounds really good; but in general, it seems rock from the 70s just never got to the level of Jazz recordings with some exceptions like Heart, Pink Floyd and Eric Clapton. He rocks. There are others too but I will still listen to many lower grade pressings for the music. I like ELP's early records but I swear at times I'm about ready to put a penny on my headshell. (Gasp!)