The otto tuners are different octaves of the note "c" in the pythagorean scale, also known as the just scale. They are the 3 octaves below middle "c" and vibrate at fewer cps (cycles per second) "c" notes of the harmonic spectrum set. They resonate with the deeper tones of the earth and can be very effective when placed on the rib heads, spine, sternum, sacrum and ilium. The sound vibrates directly into the bones to relax, align and restore "tone" to body tissues. One of the fundamental mantras used in meditation is om. The intention of 'om' is to cause you to be one with all life thereby opening yourself to unlimited growth. The mantra is not beneficial due to its literal translation but instead to its vibratory frequency. This fork is based on the revolution of the planets around the sun which causes the different seasons like spring, summer, autumn and winter. It vibrates to a frequency equal to an earth year which is 365 days and is in the 32nd octave.