If the oxygen is indeed in the form of Cu20 around the copper crystals and theoretically constitutes a semiconductor, then I don't think that there is anything wrong with this idea, as my cousin (in law) refers to it as a proposal. It may well be, but unfortunately the directionality of speaker or even the mains cable is sold on this very idea. What also bothers me is that industry professionals are becoming instrumental in this snake oil business. Otherwise why would you touch that subject in your book and leave it hanging in the air without taking it to a conclusion?
Very recently my 27 years of friendship has ended. Although it appeared to be for a different reason but I know it was because of this cable issue. Unfortunately he has been in snake oil cable business for sometime and had been feeling uncomfortable with my open critisism in our Turkish forum. It became obvious that he was distancing himself from me for sometime and eventually the rope broke. Good job that it wasn't my wife. Imagine the reason for a divorce being the microdiodes in copper.
Cemal