Context: The Solfeggio frequencies originate from a medieval musical scale rediscovered in the 1990s by Dr. Joseph Puleo. Each frequency is said to correspond to a specific quality of consciousness or healing. While scientific evidence for their specific effects is limited, they are widely used in meditation music, sound healing practice and ambient composition. The frequencies are mathematically related — each digit sums to 3, 6 or 9, a pattern that has fascinated numerologists and musicians alike. Whether you approach them practically or spiritually, they make a useful compositional palette.