Cooker: the melting point of Copper is: 1,085 °C
In the process of making a cable, it is melted. Once it solidifies, the metal structure is set. No heating under that melting point would change that.
So is the other direction: Cryo treatment. No effect on conductivity.
When using supper conductivity, in extreme cold: (close to the 0 Kelvin = -297 °C) it is not a copper conductor, but composite material. None apply to Audio. They are used in supercomputers or cold fusion attempts.
And further you believe;
Directional: Sound is an AC signal. It's nature to flow 50% of the time in one direction and the other 50% of the time in the other. (Nyquist theory, that all AC signals can be broken down into sine waves, is the basic of digital Audio!).
When you claim on a cable it's directional, which 50% of the time it benefits, and which 50% of the time it doesn't?
Also;
It's fun to crash them, one at a time. There are so many. The latest is called: Geometry.
It will expend for Quantum physics, String theory, Singularity quiq to come and maybe lean over older fashioned religious blessing or cursing, to get ignorance to the a new hight.
Man-o-man your just precious!
Please, do not ever change!
Can you message me whenever you are going to, "Crash" something in physics or math? Like geometry! I just have to see that.
Ok, buh bye now..
(waves).