That was an interesting comparison between language acquisition and pitch recognition. It makes sense. If a child learns an additional language young enough there is good chance they will have a very good accent. Yes, an adult can become fluent in an additional language but it’s very unlikely that they developed a native speakers accent. Maybe perfect pitch and relative pitch is a comparable skill and learning process?
Native speaker ability including native accent has an age limit of 7, I know that from my linguistics courses. After 7, the brain is no more flexible enough to completely wipe out a foreign accent.
But I don‘t think perfect pitch is comparable as there is no learning involved in recognizing if two frequencies are identical if they are played many hours apart from one another. Just the technical denominations have to be learned, not perfect pitch as such. I think it‘s genetically present or not.
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