Directional interconnect cables

Yes, wire is directional and I have confirmed that to my own satisfaction including eliminating dielectric and shield ground effects. Once burned in, changing direction of the cable is clearly audible. I know this proves nothing to you but if you try it you will likely discover the same thing.

Showing my ignorance here, but if analog audio signals are AC, how is there any directionality at all apart from shielding ground?

Showing common sense. IMHO. Wires are not diodes. It doesn't matter which way round they go. Shield ground point can have an effect.

How do you remove the dielectric effect???

By running the wires in air. This was achieved with some difficulty of course, but nevertheless achieved. No shield and no dielectric apart from air. The two components were faced back to back, the wire connecting the RCAs was very high purity silver, 24AWG on cold and 26AWG on hot, and then tensioned so that the wires ran in parallel througn the air with no insulation used. With the wire concerned, once it had been burned in, reversing it resulted in a change in sound, most particularly a loss of openness in the treble, and loss of firmness in the bass; a sound very similar to what an identical set that had not been burned in sounded like.

Did you burn them in each time that you changed direction? What about the charge in the insulation (it's a dielectric)? I suspect that if you burn them in after each directional change, then you will have reversed directionality.

Dave