The community of Physicists (if you can cal it that), although aware that we do not yet understand the totality of the physical Universe, are in agreement that we now and forever know all there is about Newtonian Mechanics. The sound of cables is a part of Newtonian Physics. Physics will tell you that cables, if working for their intended use of power delivery, do not have a sound that is perceptible to human ears. Ende.
Now, human perception is a field of study that is not complete, that is still evolving. The interaction of the brain with music is a ripe field for continued discovery. It is my firm understanding that because there is so much more to discover on this topic, one cannot say categorically that cables have no perceived sonic signature. The human interaction must be considered and understood. This effort is ongoing, but not at all complete as Newtonian Physics is.
Blind testing is helpful, but does not does not provide much information about the emotional process of listening. We desperately need a deeper understanding on this topic, one that everyone can understand. This will come from basic research.

