"The intention carried by a music is more influential than the pitch to which it is tuned. The choice of scales - and therefore the resulting intervals - are also fundamental in my understanding. There are several. There are 15,000 scales in Indian music."
"Stating that 432 Hz corresponds to the proportions of the Cheops pyramid, Maya temples, the speed of light, the frequency of the water, the frequency of the human heart or the Precession of the equinoxes is therefore pure fantasy and I classify these statements as fragile and partisan."
"Play any higher tone followed by a slightly lower one and you can convince yourself and others that the second is more relaxed and resolved, and less ‘harsh’. This is simply a trick of associating negative connotations to higher pitches and positive ones to lower pitches. A higher pitch could be described as harsh, cerebral, brash, brittle and sterile (as opposed to soft, spiritual, peaceful, relaxed and warm) or strong, thoughtful, brave, optimistic and bright (as opposed to weak, thoughtless, cowardly, pessimistic and dull). Our expectations do the rest. If you value anecdotes, then consider this: I’ve discussed the 440Hz/432Hz issue and played the two tones to an audience, almost all agree that the latter sounds more ‘relaxed’ and ‘peaceful’. However it’s then revealed that what was actually heard was 432Hz followed by a 424.15Hz tone (a drop in pitch proportional to 440Hz-432Hz)."
"Fiction: Mozart used 432 Hz for all of his music.
Fact: The only evidence for Mozart’s A comes from an ancient tuning fork from 1780 with the tone of A=421.6 Hz. This tuning fork belonged to the Viennese piano builder Johann Andreas Stein, the leading piano maker in Vienna at the time, who was responsible for Mozart's pianos as well as Haydn’s and Beethoven’s. It is likely that they have all used A=421.6Hz."https://ask.audio/articles/music-theory-432-hz-tuning-separating-fact-from-fiction