Thorsten Loesch
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This is a variant of "Absence of evidence is not evidence of absence".
It is more than that.
I pointed out that since "high fidelity" was first attempted to be formalised in terms of numbers that form engineering targets, these targets have moved and additional formalised specifics have been added.
So over time engineers found additional fidelity impairments and charaterised them.
I think it show incredible mental arrogance to claim that we can be certain nothing more remains to be uncovered.
As a minimum, if someone claims the existence of unmeasured impairment of fidelity, a valid hypothesis ought to be presented.
Well, I do not claim any such things, you see. I observe and state my observations and suggest that to me it seems more investigation is needed, which was outside the remit of my own work.
No claim. No hypothesis.
Just "if I do A I relibly get one set of preference and a different one one for B". Note this does not even claim that there was any audible difference, merely that persistent preference could be established under blind conditions.
I offer no explanation.
If you were to press me, I would admit that logic and old Bill of Occam's razor suggest an actual audible difference as root cause and that it may be useful to investigate further to see if this hypothesis can be confirmed. But I am not making such claim in any scientific sense.
I do not even suggest "unmeasured" anywhere, but merely not covered by an extremely limited set of common metrics.
I appreciate that some others here might find implications arising from my observations in disagreement with deeply held believes and feel the need block any such idea that some doubts remain and that there may be something not fully or sufficiently understood in audio.
In this case it may be easiest to ignore such observations as disagree with ones prejudices and refuse to acknowledge them. Alternatively it would be as easy to simply admit that there may be things that remain to be yet understood and wish investitors good luck, but reserve any final judgement until a more complete picture is available.
Challenging them in the way it is often done here is counter productive, if the interest is the investigation and understanding of Audio, fidelity impairments and how they affect listening experience, in other words, if we actually are doing science.
Thor