40 Hz: the gamma band, borrowed from neuroscience as a rhythm rather than a remedy. Gamma oscillations near 40 Hz appear in the brain during focused, bound-together perception, and a line of laboratory research (notably the MIT 'GENUS' studies) has explored 40 Hz sensory stimulation in animal and early human work. Auriviel presents 40 Hz as a musical pulse to sit with (a tempo of attention) and makes no clinical claim from that research. 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.