As I often mention: there are a plethora of phenomena surrounding us (our universe*), that science/Physics has yet to understan

     For instance: 95-96% percent of what makes it* up, to this day remains unknown/a mystery.

            No one has all the answers, or: can make definitive statements.

      That's why what's studied in our halls of higher learning, is refered to as 'Electrical Theory'.

                                      Regarding entanglement*: 

https://phys.org/news/2025-01-quantum-entanglement-nanoscale.html

       *That particular phenomenon (second paragraph in above article) has been accepted by Physicists, for decades.

                                            Happy listening!

@mclinnguy +1

@rodman99999 

Were ... the DC voltage/current ... modulated ... into an amplified musical signal; it would appear much more complex, but: still a sinusoidal wave

Your article about sinusoidals did not actually define what they are!  They are pure sine waves.  Musical signals are not a pure sine wave as you stated.  However, any periodic wave can be mathematically represented by an infinite sum of sine waves  each having a wavelength which is an integer fraction of the target wave.

Explanations work best when the terms are used correctly.

@rodman99999

That particular phenomenon (second paragraph in above article) has been accepted by Physicists, for decades

Almost a century, in fact!  But quantum entanglement has no practical applicability to music reproduction today.  It may in the next few years feature in a class of computing that is not based on binary logic, that may be useful for solving some problems. 

It has never been demonstrated (to this point) that it can be used to communicate faster than the speed of light.  To quote Wikipedia 

However, despite the fact that entanglement can produce statistical correlations between events in widely separated places, it cannot be used for faster-than-light communication.^{[10][11][12]: 453}