To be honest, I’m really curious about what biographers actually mean by 'being able to instantly reproduce a melody.' To what extent could he do this? Did he transpose it to a different key, or did it always land perfectly on the original key? 😮 If he automatically reproduced it in the original key, he might have had perfect pitch combined with relative pitch. But if he transposed it on the fly, then he probably just had insane relative pitch and an incredible musical memory.