Agreed on everything you said. I'll add one thing: normally you hear Doppler effect with a nearly constant sound (emergency sirens.) Here the pitches are chang

Agreed on everything you said. I'll add one thing: normally you hear Doppler effect with a nearly constant sound (emergency sirens.) Here the pitches are changing, but because our minds instantly recognize the 8-step Western scale we can pick out the frequency shift even though the frequency changes between the different notes may be the larger change.