donato
500+ Head-Fier
Lols Bassic, I did take a class or two, in fact I took a whole bunch of them (engineer life!!)
You are bang-on in one way - nothing in the design of cabling/devices, beyond the relevant standard, makes much difference to packet integrity in the network......in ethernet, packets flow back and forth, get corrected, buffered and ingested. In USB/SPDIF etc, signal data flows continuously, usually isosynchronous (for audio applications) and gets buffered, parsed and distributed by the receiver. All good. occasionally there are snags, but that's usually due to broken/damaged kit rather than 'quality' issues. Sometimes very long lengths of USB can't sustain high data rates, but that's just crappy conductors, and easily cured by spending $20 rather than $10 on the cable
I do see benefit in good digital cabling and switches, but only after everything else is as you want it. Reducing RF noise in the digital domain does help in two broad classes of circuits - D/D conversion (i.e. a network bridge converting Packet data to Iso signals like USB or SPDIF) and D/A convertors - both have a mix of IC's and solid state devices - filters and OpAmps are very susceptible to RF-induced impedance in circuits, and it does affect the dynamic range and dynamics of the modulated output waveform
But, it's a subtle effect, and you won't really hear it until you are maxed out on speakers, headphones and amplifiers. Slightly disagree on headphone cables - they can have marked effect on sound presentation, but they won't make a gash signal sound good
But what about galvanic isolation from networking equipment? Could that provide benefit e.g. Sonore opticalRendu?