It cannot be judged for accuracy. Maybe timing, but not much else. Amplified instruments do not provide an accurate point of reference sine the instruments; tone will be enslaved by the musical instruments amplifiers' distortions. Even vocals can suffer from control-board-itis and compression.
How can a system be judged with highly processed, non acoustic music?
I basically know what an instrument or human voice sounds like. I understand that almost all recordings, analog or digital, go through some level of processing. I also know that there are many, many recordings which strive to present a natural, real sound. To me, I can best judge a system playing lightly or non processed acoustic music.
This is also my preference for listening in general. And for me, it is vinyl.
This is also my preference for listening in general. And for me, it is vinyl.