Difference in sound between copper and silver digital cables?

I have built and sold USB cables for years trying all manner of conductors. Easy to hear the sonic character of pure silver vs. pure copper conductors in identical designs. One can also easily hear synthetic vs natural conductor coverings. My customers could easily tell when sending them two different USB cables to try and report back. Same general differences as found in analog cables. Materials have a sound regardless of design. They just do.

Is it possible some are less able to hear these differences? Yes indeed.

@audiozenology, perhaps if you speak from empirical evidence doing comparison on your own and say you perceive no difference, then your comment may lend some credibility but just stating theory from science book or wherever makes you fall into the same bucket of cynics.  

grannyring"I have built and sold USB cables for years trying all manner of conductors. Easy to hear the sonic character of pure silver vs. pure copper conductors in identical designs"

And that is the problem with those who have never undertaken such a task, chore, or effort they "surmise" from an elemental, basic, introductory text or from intuition or from a wikipedia or other internet "source" that such is not possible so they assert, argue, and insist that it is not possible but have never actually experienced that upon which they pronounce such unilateral, definitive, absolute conclusions and I therefore give you credit for "rolling up you’re sleeves" as Americans would say and actually doing some work!

If one doesn’t honor the inherent directionality of wire and cryogenically treat the wire then he cannot compete in today’s marketplace. In fact he can’t compete in yesterday’s marketplace.