A system and method for balancing the Autonomic Nervous System (ANS) of a person to achieve a desired physiological response requires a computer for translating a measured physiological function into a fundamental tone, ftone. In particular, the fundamental tone, ftone, is based on an inflection between sympathetic and parasympathetic responses from the ANS of the person. Binaural frequencies (f1 and f2) are established to straddle the fundamental tone, ftone, of the person, and are differentiated by a preselected beat frequency, fbeat (i.e. a brain wave frequency). A headphone is then used for simultaneously transmitting a respective binaural frequency (f1 or f2) to a respective auditory canal of the person, to thereby use the beat frequency, fbeat, for achievement of the desired physiological response. Operationally, once it has been ascertained by the computer, the fundamental tone, ftone, can be retrieved from a backup service (i.e. the “cloud”).