Systems and methods for using particular types of music compositions having certain characteristics to treat depression and related disorders, autism, and other disorders are described. The music for use in music therapy efforts includes characteristics for modification of the psycho-physiological apparatus and response including the use of vocal invented language elements to simulate pre-verbal communication and elements to coincide with and work with natural chrono-biological and circadian rhythms. For example, activating elements are provided in some compositions that are to be played immediately prior to a peak of chrono-biological activity. As another example, other compositions include de-activating elements to improve relaxation immediately prior to a natural low of chrono-biological activity. Such activating and de-activating elements include musical elements such as changes of volume, frequency selection, and tempo. The compositions may be used to treat depression and other disorders based on timing and application of music therapy using the compositions.
