I can just barely read standard musical notation but it’s far from fluent. I’m wondering if, with enough practice you can look at sheet music that you have never heard or seen before and sound it out in your head before ever touching your instrument?
Baroque musique for example is often played at A = 415 Hz as opposed to 440 Hz, so someone who has their absolute pitch set on A = 440 Hz, because it is the current international standard, may be very disturbed.
More details: https://en.wikipedia.org/wiki/Absolute_pitch#Possible_problems
Also yes. My wife says that to her, Baroque tuning sounds basically like a half-step below what’s written (which is pretty close).
This explains, IMO, why so much well-loved Baroque music is in D major. D♭ major is such a beautiful key, after all! 🙂