I must really retire!! When I was a kid (at uni) 1dB was the smallest detectable change that the human ear could perceive, and that was for volume level. Also that was under ideal laboratory conditions. What about the "tone controls" set by the recording engineer??
I will put a phew dollars on it, that the guy running the mixer, mixed what he considered a good sound!! Be damned with RIAA!! BUT when it's mixed down and "compressed" to vinyl format, does it really matter? .13 dB deviation from the ideal ( and I MUST add, in YOUR laboratory only) coupled to a ball raced volume control, must be better than the London Symphony Orchestra, live!!
Within an RIAA curve
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My last post was deleted as being rubbish (as are 99% of my posts) But is .13dB deviation anything to even consider? With my respects!!.
( A local electronics magazine called Radio, Television and Hobbies, once had a regular monthly discussion, called "Lets Buy an Argument" Perhaps the convenors of this site would consider an equivalent?
Joe