Are certain, specific sonic frequencies the key to love, intuition, and spiritual order? Do the sounds we hear have a real physiological effect?
First, their claims. The idea is that certain notes found in ancient music have special uses. Pitches, or notes, are described in Hertz (abbreviated Hz), which is their frequency in cycles per second.
For example, one of the special Solfeggio frequencies is said to be 396 Hz. It sounds like this. [396 Hz] Named UT, it is supposed to be good for “liberating guilt and fear”.
Next is the one called RE, at 417 Hz. [417 Hz] This is good for “undoing situations and facilitating change”.
Impressed? Wait until you hear MI, at 528 Hz. It does “transformation and miracles”, including DNA repair. [528 Hz]
FA, at 629 Hz, is for “connecting and relationships”. [629 Hz]
SOL, at 741 Hz is for “awakening intuition”. [741 Hz]
And LA, at 852 Hz, is for “returning to spiritual order”. [852 Hz]
Now, you may have noticed a couple of patterns. One is that, just like most other woo-y, New Age modalities, the claims are all very breezy and unspecific. If they remind you a little of Deepak Chopra that’s not exactly an accident. Some of the web pages promoting Solfeggio Frequencies use his confused misinterpretations of quantum physics for support.
You may recall from Skeptoid #431 how acupuncture proponents can’t even decide how many meridians exist, nor where they are. Similarly, when we dig into Solfeggio Frequencies there are disagreements. One proponent says that the key frequency is not 417, [417 Hz] but 432 Hz. [432 Hz] Further, he claims that this “purest” of sounds is the same frequency to which both the great pyramids of Giza and the Sun itself are tuned.
Yet another proponent says 528 Hz [528 Hz] is the “love frequency” that not only repairs DNA but can “raise the vibration in our chakra system”. There’s no evidence for a chakra system, and this odd use of the word “vibration” resonates more with woo than science.
In fact, if I play the Solfeggio Frequencies as specified on most of the web sites, the scale sounds a little out of tune. [Solfeggio Mystic Hexachord]
As is typical of woo, proponents make an appeal to antiquity. What makes these notes special, you see, is that they come from a medieval Gregorian chant to John the Baptist. It’s one of those things the ancients “just understood.” But, in modern times, our music was retuned to 440 Hz  and the secret was lost. Or hidden on purpose, depending on who you read. Some even blame the change, darkly, on a Nazi plot.