Yeah, was confused. The Barbers definitely played each other.

The sound source is moving in the above scenario relative to a stationary object. I’m not saying you’re wrong but that was my thinking.

I think eventually you reach a point where previously played notes would lose all of their energy, meaning there’s probably an upper limit on how loud it would get for an observer at the end. Something something Doppler effect.

This is pretty profoundly fucked.