Simple question, or is it...

Mass. Of course the audio signal in cables and wires has no mass if you subscribe to the idea that it’s an electromagnetic wave. You know, with the mass of photons these days being what it is. Jump on it!

*S* So, in 25 hours and 18 minutes...

Alan Watts to quantum cosmology, with a brief stint of M.C. Hammer.

(At least the word 'audio' showed up...occasionally....) ;)

Toss in some Babble verses and it's a show that never ends.

Oh, you mean like this? 😃

djones51
When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put the ways of childhood behind me.

Getting back to the dodgy subject of does the signal travel inside the conductor or outside the conductor, the speed of the signal in a copper conductor is measured to be some high fraction of the velocity of light in a vacuum, let’s say it’s 85% of c for the sake of argument. But if the signal were mostly traveling OUTSIDE the conductor - in air - as some have argued, wouldn’t the speed of the signal be a lot closer to the speed of light in a vacuum? Or about 99.9% of c, not 85%.