My horse in this race is that I know somebody who was raised on western music and has the same problem. I don't know if it's amusia per se or some related patho

My horse in this race is that I know somebody who was raised on western music and has the same problem. I don't know if it's amusia per se or some related pathology, but I definitely think it's not just acculturation. We spent several hours arguing whether music theory was a valid field of study or complete bunk until we noticed he didn't perceive melodic harmony at all. It was fun, if exhausting. That person also nailed an amusia test, which makes me suspect there's a separate condition.