Here's an interesting quote on the utility of perfect pitch outside of music: "Absolute pitch is too fine a form of categorisation," she said. "If that is all

Here's an interesting quote on the utility of perfect pitch outside of music: "Absolute pitch is too fine a form of categorisation," she said. "If that is all we knew, we couldn't generalise any of the sounds we hear. If we only used absolute pitch as adults, we couldn't understand that 'happy birthday' in two different pitches is the same song, or that the word 'cup' spoken by a man or a woman, is the same word." https://www.theguardian.com/uk/2001/feb/21/timradford https://www.theguardian.com/uk/2001/feb/21/timradford (an article originally linked to by jacquesm.) Also, perfect pitch is apparently much more common among native speakers of tonal languages.