[KC_for_Freedom]

Electronic signal can be reversed then sent into an amp and speaker.
The idea (which would not have worked ) would require fast signal switching but this is possible. Where the plan fails is that the signal level has to be matched too. Where the listener is located but it has to be matched everywhere, for all locations. This can’t be done. So the city would be paying for something that is technically impossible.

[A Navy Vet]

Thank you, but the signal being reversed is still over my head. Always thought a low amplitude signal from a guitar, mic, etc. was one way to the amplifier.

But then I'm a drummer, so what do I know? I currently have a top line Roland electronic drum kit that I send those analog? signals to a small 60 watt amplifier if I don't want to use headphones.