Solfeggio(take a look at https://en.wikipedia.org/wiki/Solf%C3%A8ge) frequencies were sound frequencies used in Gregorian chants. One of which was the great hymn of St. John the Baptist.
Solfeggio Frequency Meditation
These are the Solfeggio frequencies:
UT – 396 Hz – Liberating Guilt and Fear
RE – 417 Hz – Undoing Situations and Facilitating Change
MI – 528 Hz – Transformation and Miracles (DNA Repair - Repair - and derives from the phrase “MI-ra gestorum” in Latin meaning “miracle". This is the exact frequency used by genetic biochemists to repair broken DNA – the genetic blueprint upon which life is based!)
FA – 639 Hz – Connecting/Relationships
SOL – 741 Hz – Awakening Intuition
LA – 852 Hz – Returning to Spiritual Order