I think it boils down to:
-ppl making the wrong measurements using high jitter consumer grade gear and/or measuring the electrical conductivity between several cables...and using some circular logic, saying that all cables sound the same. Even an oscilloscope could shed more lights IMHO.
-the gear to measure very low jitter simply isn't accessible to many ppl. Even the world acclaimed AP package can't measure less than 100 or 200ps I think?
-some dodgy pseudo-scientific studies, using cheapo headphones and/or mono signals recorded on tapes...used as hard proofs by the ppl who only believe in what they read and refuse/are scared to try stuff *IRL*...you know the so-called "real world experience"™.
-some even dodgier pseudo-studies with ppl injecting jitter, and saying: "
hey I can inject 3ns jitter, it still sounds the same to me!". They're majorly missing the point, as at some point it doesn't matter anymore. If your water isn't crystal clear, making it even muddier won't really be visible at some point...you'll mostly be relying on the clock recovery of the receiver, until it drops out. Going from 1ps to 1ns will be audible...Hell, it's even audible from 1ns toslink to 50ps coax on the Bravo(and I'm not the only one saying it).
Maybe Wolfson have better things to do than paying for some studies on WM8804/5 to be conducted? They're IC makers, they show hard proofs, that are as scientific as can get...they seem to trust measurements more than human perceptions....dummies that they are.
To get back OT, grab a bunch of USB cables...if they all sound the same to you, then Hallelujah brother! One less thing to worry about
I think it ends up being more a religious matter at some point, because it's often the same ppl who believe that all opamps sound the same that also seem convinced that all cables sound the same(and that jitter isn't audible either, of course). Hell, if all analog/digital cables and opamps sounded the same...in the bizzaro world maybe.
I demand USB cables made out of coat hangers to prove YOUR case. As long as there's electricity getting through, all cables sound the same, right? Prove it...why should the non-believers always have the easy part?