nowadays 440hz tone frequency is world standard as musical TONE 'A'.
I saw in youtube that 432hz is more equl to earh cyle than 440hz.
and then i try to calculate my self resonance frequncy to earh cycle. (rotation period and revolution cycle)
calculate resonance frequency to earth rotation period 24 hour
one day = 86400 second
1/86400 hz is earth rotation frequency
1/86400 * 2^25 = 388.36
388.36 hz is resonance frequency tone as earth rotaion
calculate resonance frequency to earth revolution cycle 365.2425 days
200hz < 1.0 / 365.2425days * 86400 second * 2 ^ n < 800 hz
n =33,34 ( 272.20 hz , 544.4hz)
( 272.20 hz , 544.4hz) is resonance frequency tone as earth revolution cycle
compare standard music tone frequency 440hz (and also 432 hz)
I compare this frequencys to 12 musical tones c,c#,d,d#,e,f,f#,g,g#,a,a#,b from 440hz and 432hz.
388.36 hz, resonance frequency earth rotation period is simiar as tone G.
and 272.20 hz, resonance frequency earth revolution cycle is simiar as tone C#.
but little different about 1%. from both 440hz, 432hz
centural korean traditional music tone is 259 hz
I discover korea traditional music tone frequency is almost same both earth resonance frequency that i found. (revolution, rotation)
only 0.1% different.
central korea tradtional music tone frequency is 259 hz( 황종(hwang-jong,黃鐘) )
other tone can be calculate from this tone(황종), 259hz
388.36 hz, resonance frequency earth rotation period is same as tone 임종. (林鐘 388.5 hz)
and 272.20 hz, resonance frequency earth revolution cycle is simiar as 대려(大呂 274~276.6hz).
example of calculate frequency about 대려 high semitone than 259hz ( 황종)
three way (equal temperament, Pythagorean tuning , Just intonation)
equal temperament (1.0594^n)
259 * 1.0594=274.3846
pythagorean ( 3 ^ x / 2 ^ y)
259 * 2187 / 2048 = 276.57861328125
Just intonation ( below 16 natural number / natural number)
259 * 16 / 15 =276.26666666666666666666666666667
if somebody want korea traditon musical theory .. i can write about that.