Tones Barbara Hero and kindred researchers tied to the planetary grid and to sacred cosmological numbers. This small family gathers pitches connected to the geometry of the Earth's surface (the so-called planetary grid) and to number-lore such as the Hindu cosmological cycles. They extend Hero's Lambdoma approach outward from the body to the planet, translating proportions of place and time into sound. Independent of any tradition, controlled clinical evidence that a specific frequency produces a specific health effect is limited and mixed. Auriviel presents these tunings as music and contemplative practice. This page is for general information and relaxation. Auriviel's frequency music is not medical advice, diagnosis, or treatment, and no health outcome is claimed. If you have a medical concern, please consult a qualified professional.