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2'675Hz "The Crystal Resonator": A subharmonic of the frequency of quartz crystal. "Extremely effective for charging and clearing quartz crystals .. useful for clearing and balancing of their own energies. Some claim it energizes crystals in the brain. Others say that it activates aspects of the auric field. 8D Audio Movement: Optimizes your brain as a sound receptor by attempting to synchronize your brain hemispheres by moving the sound in a full circle.