Comment by BXLE_1-1-BitIs1
15 hours ago
A440 is higher than earlier tunings. Baroque is often A415 and A392 can be used for French harpsichord music.
Equal temper results in each key being so many semitones above or below C Major.
Other temperaments have a distribution of pure and dissonant intervals giving different colors to each key. Certain keys would not be useful or notes would have to be adjusted to make a key sound right.
I did some baroque harpsichord tuning in my past. Nobody I knew in the field of baroque keyboard tuning had absolute pitch, because it would drive you crazy if you did with all the wandering A's. When you want to flex between A=440, A=430, and A=415 (392 is a lot less common) regularly and your ear is tuned to a 440 A, I hear it gets really annoying because everything seems flat. In comparison, a huge number of piano tuners and organ tuners have absolute pitch.