Since I've already written about the research pertaining to the left and right hemispheres of the human brain, I will defer to Dan Eden's article here on viewzone for a detailed understanding of this phenomenon.

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If you google the topic, you will discover that the debate over which tuning system is optimal is a very controversial and heated one.

In preparation for this article I have spent days reading blogs and watching You Tube videos on the subject.

The arguments can get pretty technical with proponents of 432 claiming that it resonates with the Heart Chakra, repairs DNA and restores both spiritual and mental health.

There is even the suggestion that 432 tuned music stimulates the right brain, responsible for our most desirable human traits.

Note Frequency (hz) - Mid Low (1 octave below middle C) C 128 D 144 E 162 F 176 G 192 A 216 B 243 -- Mid (middle C) C 256 D 288 E 324 F 352 G 384 A 432 B 486 -- Mid High (1 octave above middle C) C 512 D 576 E 648 F 704 G 768 A 864 B 972 Remember that the frequency is measured in cycles per second, which means it used the standard unit of time to determine the frequency number.

Since the unit of time -- the second -- is based on the rotation of the earth = 1/86,400 th of a day, this could emphasize some natural connection and perhaps there is some kind of mathematical resonance going on here.I did locate an experiment published in the Journal of the Acoustic Society of America (114, 2409 2003) which had music students listen to classical compositions written by some world famous composers in 432 Hz tuning (Chopin, d'Albert, Bach, Debussy, Mozart and Reger) which were played in their original pitch and then played in 440 Hz.Some scientists have noticed that the frequencies of the various notes can be expressed in whole numbers in the 432 Hz tuning system.The 440 Hz system results in more complex fractions.Often the simplest solution is most likely the correct one.Modern Standard Tuning (A = 440 hz, C = 261.63 hz)(Sources) Note Frequency (hz) -- Mid Low (1 octave below middle C) C 130.81 D 146.83 E 164.81 F 174.61 G 196 A 220 B 246.94 -- Mid (middle C) C 261.63 D 293.66 E 329.63 F 349.23 G 392 A 440 B 493.88 -- Mid High (1 octave above middle C) C 523.25 D 587.33 E 659.26 F 698.46 G 783.99 A 880.00 B 987.77 Stradivari/Verdi Tuning (A = 432 hz, C = 256 hz), calculated using the Pythagorean method of 3:2 ratio for dominants, 11:8 for sub-dominants, 2:1 for octaves.