These tone frequencies were supposedly a set of six notes of an ancient musical scale used in Sanskrit and Gregorian Chants, rediscovered by Dr. Joseph Puleo as described by Dr. Leonard Horowitz in his book “Healing Codes for the Biological Apocalypse”
Ut (Do) = 396Hz
Re = 417Hz
Mi = 528Hz
Fa = 639Hz
Sol = 741Hz
La = 852Hz
Those names were taken from the first syllables of the hymn to St. John the Baptist:
Utqueant laxis
Resonare fibris
Mira gestorum
Famuli tuorum
Solve polluti
Labii reatum Sancte Iohannes (Later on became note Si)
As suggested by its lyrics, each phrase has a mystic meaning, that is also related to its sound (frequency):
Ut = 396Hz - Liberation from Guilt and Fear
Re = 417Hz - Change, Transmutation, Moving On From Past Beliefs, Undoing Situations
Mi = 528Hz - Miracle and Transformation (DNA Repair)
Fa = 639Hz - Relationships and connection with people
Sol = 741Hz - Intuition, Consciousness Expansion, Awakening
La = 852Hz - Spiritual Reconnection
Those frequencies are also reduced to the numbers 9-3-6, which suggests a connection to the Holy Trinity.
Each frequency has a specific spiritual and physical healing properties, and were believed to bring great spiritual blessings when sung in harmony with the masses during religious cults.
There is also the extended 9-tone Solfeggio Scale that will include 174 Hz, 285 Hz, 963 Hz - resolving the 9-3-6 numeric cycle.
Solfeggio Tones
All the information above was gathered by deep research through solid resources. Still, it is not intended to be used as a scientific proven healing methodology by any means. Feel free to read through it and use this music and information by your own responsibility and beliefs.