@drbond 1+
Early rock and blues where not taken seriously and given short shrift in the quality department. Kids bought mostly 45s. Classical and some jazz were given much more attention in terms of quality. The early stereo mixes of rock recordings could be comical if it was not so sad. Stuff like all the instruments on the right and vocals on the left were not uncommon. The production of rock and blues records was not taken as seriously either. My Dad's classical RCA Red Labels were pristine but The early Jefferson Airplane RCAs were terrible in all regards. In time recording of modern music improved but the quality of popular music pressings did not. They were never as good as the European classical records or older RCAs. In the mean while American Classical deteriorated. London pressings were never as good as Decca, same company.