Does American ban using a headset to listen to music over Bluetooth while in cruise

Explicitly, clearly, unquestinably, yes...

I find it nearly unbelievable that you would ask... I love listening to music, have a music room at home, and always something new to listen to on a deadhead.

In flight, while in the cockpit, on duty?

Because you lead a stressful lifestyle?

Seriously?

They call it "work" and "duty" for a reason.