This is not about the movie(s). Amazingly, that didn't even occur to us before, during, or even immediately after recording this... This is about the ability some people have to identify or possibly produce exact notes, called perfect pitch, or natural pitch, or absolute pitch. Is it genetic? Is it learned? Are those nonsensical questions? We'll explain a bit of the research on perfect pitch (and relative pitch, which is technically different).
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Links and References:

1. https://www.sciencedirect.com/science/article/pii/S0002929707634867#:~:text=Absolute%20pitch%20(AP)%2C%20also%20known%20as%20%E2%80%9Cperfect,musical%20tone%2C%20without%20an%20external%20reference%20pitch.
2. https://www.huddlestone.es/en/perfect-pitch/
3. https://news.uchicago.edu/explainer/what-is-perfect-pitch
4. https://www.musical-u.com/learn/perfect-pitch-is-not-magic/

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