The word Karuna is derived from Sanskrit and it can be translated as "compassionate action", that is, any action taken to lessen the suffering of others. The Karuna Reiki(r) method was developed by William Lee Rand, who recommends, as well as the laying on of hands on the body, toning and chanting a series of symbols, in order to strengthen and amplify the energy during the Karuna therapy.
The healing power of singing, toning and chanting has been well known since ancient times, when high priests and shamans used singing to recite the healing prayers. As a matter of fact, no musical instrument has the same healing power as the human voice.
The Karuna intonations are performed through a sequence of different intervals. An interval is the distance between two notes. Each note of the interval vibrates at different frequencies. Each interval has its own characteristics: diatonic intervals up to and including the fourth act mainly from inside the body, whereas the sequence of intervals from the fifth to the octave create a connection between the inside and the outside of the body.
The intonations used in this music are based on intervals with identical characteristics to the symbol we are toning, in order to strengthen the healing action.

ZONAR, toned on a major second interval (C - D), creates a sense of immobility that later brings us to the beginning of the movement, gently liberating sensations and recollections that are part of our emotional life. The second ZONAR intonation, a major third, inspires a higher emotional and sensitive life, preparing the individual to relive old emotions, weakening and reducing the suffering associated with emotional healing (C - E).

HALU, a perfect fourth interval (C - F), awakens the individual from a dream, from old emotions lived in the previous intonations. HALU is also toned on a perfect fifth interval (C - G), balancing the internal and external space of the body, bringing in addition joy and expansion to the body.

HARTH is toned on a major sixth (C - A). It is an ethereal interval, which does not generate tensions, allowing us to feel the emotions of sweetness and love transmitted by its compassionate action.

RAMA has an interval of an octave that balances the lower and the higher chakras and allows the individual to reach the superior self. In bringing stability it gives balance to the past and the future (C - C).

GNOSA is toned on a perfect fifth, balancing the internal and external space of the body, bringing joy and expansion to the organism (C - G).

KRIYA has an interval of an octave, gives stability and clarity of mind (C - C).

IAVA has both a perfect fifth and a minor third interval (C - G), (C - D flat). It touches even further the emotional space of the individual.

SHANTI, its interval is a sixth, implying great openness and sweetness (C - A).