I don't know why everybody is getting so hot under the collar. After all, as you point out, this is a science forum, and all I am trying to do is point out areas where science might have something useful to say on the topic, which is, in case we forget, "I don't get why audiophile USB cable would improve sound quality". I don't think I have been dissing anybody. It is not disrespectful to address somebody's viewpoint with a reasoned counter-argument. I am open to that myself.
I have pointed out a scientifically valid explanation for why the jitter threshold for 24/192 audio could be as low as 310 femtoseconds.
I have pointed out a scientifically valid explanation for why a USB cable's properties might affect the jitter in the range of hundreds of picoseconds and below.
I have tried to point out that some aspects of jitter are measurable, whereas some are not.
I have tried to point out that any theoretical analysis of the measurable effects of jitter on the audio signal is difficult, if not impossible.
I have tried to get some measure of acceptance of the notion that some things which are audible are not measurable.
I don't believe I am foisting any radical voodoo or scientific pseudo-babble on anybody.
Taken together, all these observations add up to a basis for postulating that there is a reasonable argument to be made that a USB cable can impact the sound quality of a high end audio system. Further, I am pointing out that this may even be true despite the fact that nobody can tell you what those audible effects could or should be, not can they tell you what to go away and measure in order to verify or deny the existence of such effects. That's all.
But instead, I am reduced to a "believer", a term used dismissively, if not pejoratively. On the other hand "no matter how much scientific evidence we provide" attempts to stake out the rational high ground, based on ... what, exactly?.
Sorry, but if this is a Science Forum, I'm Obama's mullah. I won't be back, and I'm sure I won't be missed.
The terms (non)believer or subjectivist/objectivist are just convenient short descriptives of the different sides of the debate. The problem with much of the believer side's evidence is that it is untested speculation.