The idea of 528Hz being a healing frequency for DNA is often associated with Dr. Leonard Horowitz, an American author and public speaker who has written extensively on the subject of sound healing and the effects of certain frequencies on the human body. He has promoted the idea that 528Hz can repair DNA and have a range of other health benefits. However, it's important to note that there is limited scientific evidence to support these claims, and the concept remains controversial within the scientific community.

Dr. Leonard Horowitz is a public health expert, author, and filmmaker who has been involved in sound healing research and practice for many years. He has a doctorate in dental medicine and a master's degree in public health, and has authored several books on the subject of natural healing and frequency therapy.
Dr. Horowitz has conducted extensive research on the therapeutic benefits of sound and music, including the use of specific frequencies to promote healing and balance in the body. He has developed several sound healing therapies and techniques, including the use of the ancient Solfeggio frequencies for healing and DNA repair.
In addition to his work in sound healing, Dr. Horowitz has also been involved in the study of bioenergetics and the role of energy fields in health and disease. He has written extensively on the subject of energy medicine and has developed several therapies and techniques based on the principles of vibrational healing.
Dr. Leonard Horowitz did not discover 528Hz as a frequency. However, he has been a proponent of the use of 528Hz for healing and has extensively written and spoken about it. The idea of 528Hz as a healing frequency comes from the concept of "solfeggio frequencies," which are a set of six tones used in Gregorian chants. 528Hz is one of these six tones and is believed by some to have specific healing properties. It's important to note that the scientific evidence for the healing properties of specific frequencies, including 528Hz, is not yet well-established and remains a topic of ongoing research and debate.

The origins and measurement methods of the solfeggio frequencies are somewhat unclear and debated among scholars and researchers. Some sources claim that the frequencies were originally used in ancient Gregorian chants, while others suggest that they may have been discovered or rediscovered in more recent times through various methods such as mathematical calculations or intuitive insights. The Gregorian chants were written over a period of several centuries, from the 6th to the 10th century, with the earliest known examples dating back to the 6th century. The chants were originally part of the musical repertoire of the Roman Catholic Church and were used in liturgical services. The name "Gregorian" comes from Pope Gregory I, who is said to have organized and codified the chants in the 6th century.
It's worth noting that there are also some inconsistencies and discrepancies in the specific frequencies associated with the solfeggio scale, as different sources and researchers have proposed slightly different values. Overall, the history and scientific basis of the solfeggio frequencies remains a topic of ongoing discussion and investigation in the field of sound healing.
The first mention of the solfeggio frequencies can be traced back to a medieval hymn titled "Ut queant laxis" or "Hymnus in Ioannem" written by the monk Guido of Arezzo in the 11th century. The hymn uses a six-note scale that later became known as the "hexachordum Guidonis." These six notes were later given syllabic names that corresponded to the first six notes of the major scale: Ut, Re, Mi, Fa, Sol, and La. These syllables eventually became the basis for the solfeggio scale.

The six Solfeggio frequencies are 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, and 852 Hz. These frequencies are said to correspond to the six different notes of the Solfeggio scale: Ut (396 Hz), Re (417 Hz), Mi (528 Hz), Fa (639 Hz), Sol (741 Hz), and La (852 Hz).
One significant difference between the Solfeggio scale and the C major scale is the tuning system. The Solfeggio frequencies are based on a just intonation tuning system, which uses whole number frequency ratios to produce harmonious intervals. In contrast, the C major scale is based on an equal temperament tuning system, which divides the octave into 12 equal parts, resulting in slightly dissonant intervals.
Additionally, the Solfeggio scale is often associated with spiritual and healing properties, while the C major scale is primarily used for musical expression and composition.
The Solfeggio frequencies are six tones that were used in ancient Gregorian chants, each with a specific spiritual and healing purpose. These frequencies are believed to resonate with the energy centers of the body, balance the body's energy field, and stimulate healing on a physical, emotional, and spiritual level.
On the other hand, the chakra notes are based on the seven chakras or energy centers in the body, which are believed to correspond to specific frequencies and colors. Each chakra is believed to have a different sound or frequency associated with it, and it is believed that by listening to or chanting these sounds, one can balance and activate the chakras.
While there may be some overlap between the frequencies used in the Solfeggio scale and the chakra notes, they are different systems with different frequencies and associations.
The solfeggio scale and A=432Hz tuning are often used together as they are believed to have a harmonious relationship. A=432Hz is a tuning frequency that is believed to be mathematically consistent with the patterns of the universe, and it is sometimes referred to as "the natural tuning". The solfeggio scale, on the other hand, is a series of specific frequencies that are believed to have healing properties.
While A=432Hz tuning can be applied to any musical scale, the solfeggio scale is specifically defined by a set of frequencies that are not found in the standard western musical scale. Therefore, the solfeggio frequencies and A=432Hz tuning are not the same thing, but they can be used together to create a harmonious and healing musical experience.
The 528Hz frequency and its purported healing effects on DNA remain controversial within the scientific community for several reasons. First, there is a lack of scientific evidence to support the claims made about the effects of the 528Hz frequency on DNA repair or healing. While there have been studies on the effects of sound therapy on the body and mind, these studies have not specifically focused on the 528Hz frequency.
Second, some critics argue that the claims made about the 528Hz frequency and its effects on DNA are not based on scientific principles or established scientific research methodologies. They argue that the use of terms such as "healing" and "repair" in relation to DNA is misleading and unsupported by scientific evidence.
Third, some proponents of the 528Hz frequency have made exaggerated or unsubstantiated claims about its benefits, which has contributed to skepticism and criticism from the scientific community.
It is worth noting that the scientific study of the effects of sound on the body and mind is still relatively new, and there is much that is still unknown about how sound affects us at a cellular or molecular level. While some early studies have shown promising results, more research is needed to fully understand the potential benefits of sound therapy and the specific effects of different frequencies.
Horowitz, L. G. (2008). The Book of 528: Prosperity Key of Love. Tetrahedron Publishing Group.
This book by Dr. Leonard Horowitz delves into the concept of the 528Hz frequency as a healing frequency and discusses its potential benefits. It also includes information on the history of the solfeggio frequencies and their use in sound healing.
Chang, K. (2017). The Science Behind Why We Like Music That Makes Us Cry. The Atlantic.
This article by K. Chang discusses the potential benefits of music therapy, including the use of certain frequencies such as the solfeggio frequencies. It also explores the controversy surrounding the idea of using specific frequencies for healing.
Bhamra, S., & Johnson, C. (2018). Exploring the science behind Solfeggio Frequencies. Journal of Traditional and Complementary Medicine, 9(3), 356-363.