The finely-tuned tubes of the Woodstock Healing Chime together create a rich harmony and a wonderful illusion that there are more tones than there are tubes! Listen to the soothing sound "illusion" of this Healing Chime as the precisely tuned tubes work together. The illusion seems to create more tones than the number of its tubes, such as the low bass notes created in your ear! The result is as amazing as it is unique, since we use a beautiful ancient tuning not heard on any modern instrument. This is called the Natural Harmonic Overtone Series. it's magic to your ears and a comfort to your mind.