Anyone attending to topics like "Psychophony" and generally to "Healing with sound and music" also comes across the "Solfeggio frequencies", an old six-scale which was used as early as the Middle Ages to intonate sacred chants. It has been rediscovered by the American scientist Dr. Len Horowitz. br For the present album "SOLFEGGIO-4x", the following frequencies were selected:br Frequency Tone Tuning Meaning br 396 Hz G 3 444,8 Relief from anxiety and guilt br 639 Hz D#4 451,7 Harmonious relations br 528 Hz C 4 444,1 Wonder br 963 Hz A#4 454,5 Completion br The Solfeggio tone runs permanently on a basic volume and can only be heard in certain places for some time outside of the overall musical arrangement.