A therapeutic method and sound recording including sounding a first harmonic interval for a first duration of at least approximately one minute and sounding a second harmonic interval for a second, consecutive duration for at least approximately one minute. The first and second harmonic intervals may be just intervals and/or fifths, such as Perfect 5ths (P5). The first duration may overlap with the second duration in order to sound a Major Seventh (M7) chord. The first duration may be approximately twenty minutes long or longer, the second duration may be approximately ten minutes long or longer, and the overlap between the first and second duration may be approximately ten minutes long or longer.
