I wanted to make something similar at one point. If I remember correctly... there is a physical switch in the device that gets closed when the headphones are inserted. Effectively making it impossible to route the sound, as there is no longer a any connections between the speakers and the rest of the device.
I haven't found better way than using a part of media player volume view.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.