# Solfeggio frequencies

Solfeggio frequencies is a term coined by Leonard Horowitz, DMD and Joseph Puleo in 1999[1]. It refers to a pseudoscientific belief that a set of nine frequencies derived from numerology were used centuries ago in Gregorian and Sanskrit chants. These frequencies are believed, tentatively, to impart spiritual blessings during religious ceremonies.

## Naming and possible confusion

The name "Solfeggio" - and the note syllables Ut, Re, etc. - comes from Solfège, a traditional way of naming the tones - primarily of the C major scale or any major scale (Kodaly Method) -, especially in teaching singers. The pseudoscientific theory of "Solfeggio frequencies" or "Ancient Solfeggio" should not be confused with Solfège.

## The belief

The Solfeggio frequencies include:

• 01 = 174 Hz
• 02 = 285 Hz
• Ut = 396 Hz
• Re = 417 Hz
• Mi = 528 Hz
• Fa = 639 Hz
• Sol = 741 Hz
• La = 852 Hz
• 09 = 963 Hz

The numerical values of the Solfeggio Frequences are generated by starting with the vector (1, 7, 4) and adding the vector (1, 1, 1) MOD (9). Each higher frequency is found by adding (1, 1, 1) MOD (9) to the previous lower frequency. The final frequency, when (1, 1, 1) is added to is, returns the frequency to the lowest tone (1, 7, 4).

Ut = 396 Hz which reduces to 9 [reducing numbers: 3+9 = 12 = 1 + 2 = 3 ; 3+ 6 = 9]

Re = 417 Hz which reduces to 3

Mi = 528 Hz which reduces to 6

Fa = 639 Hz which reduces to 9

Sol = 741 Hz which reduces to 3

La = 852 Hz which reduces to 6

The frequency assigned to Mi (for "Miracles"), 528 Hz, is said by proponents of the idea to be the exact frequency used by genetic engineers throughout the world to repair DNA.[citation needed][2]

The "Solfeggio frequencies" are cyclic variation of the numbers 369, 147 and 258.[3]

It is claimed that each frequency has specific spiritual and physical healing properties. It is also claimed that they are part of a process that can assist you in creating the possibility of life without stress, illness, and sickness.[4]

## Controversy

The technology for measuring frequency, and even understanding of how sound is characterized by frequency, including the very measurement of Hertz or "cycles per second" that the theory is based on, is very recent compared to Gregorian chanting.

Also, the above frequencies bear little semblance to the harmonic series that is at the heart of all musical systems used in the world.

For these reasons, the Solfeggio frequencies are considered a pseudoscience.