There are different standards for each engineer, though a few of these are popular, never heard a few used ever. Its more important to know the song and how it

There are different standards for each engineer, though a few of these are popular, never heard a few used ever. Its more important to know the song and how it sounds on many systems. It's not like the 60s where only a few refrence quality recordings existed. Also emerging quality standards can have an effect. In the 90s, refrence tracks started having much more bass than before, but the sound cymbals make has always been hard to reproduce and tend to sound a bit different. In the end, its all subjective.