--First there is more than one set of measures : electrical, mechanical, and acoustical and neurophysiological in any psycho-acoustics experiments ...
--Second, accuracy in these different set of measures can be set at various levels in many experiments ...Quantitative accuracy must be CORRELATED here to subjective qualitative accuracy ( perception) ...
--Third "accuracy" in electrical and mechanical design must be correlated to hearing proper accuracy in psycho-acoustic varying parameters in a CYCLE of experiments which at the end will improve the " musical experience" for all listeners , nevermind their prefered blinders , be it an objectivist or a subjectivist blinders ,...
We hear with our ears/brain but we use electrical tools and design to optimize our experience guided by acoustics principles which always CORRELATE the perceiving subject with objective parameters in a controlled environment ( our dedicated room or a laboratory )..
It is astounding to see people lacking any psycho-acoustics concepts quarelling about subjectivity OR objectivity as children divided in two groups ...
Then the measurement crowd and the subjectivist crowd are wrong in the same way, by ignorance in acoustics concepts ... They focus on a common core : the gear and/or the electrical tool and they forgot acoustics concepts ...
My two cents...
You can measure an audio signal accurately, but accuracy of the music cannot be measured.
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