The Soundstone is a remarkable instrument of raw polished rock developed in the 1970's by German sculptor Elmar Daucher. Klaus and Hannes Fessmann have evolved it since the early 90's to a new level of beauty, craftsmanship and singing ability.
The blades, or lamella, vibrate freely when stroked properly. Water is used to create a slight friction between the stone and different parts of the skin of the hands, bringing out a low and high tone (sine wave) for each lamella. Advanced players have access to even more tones. A crystal bowl has one tone. A Soundstone has two tones times the number of blades.
My instrument below has 12 blades and so has 24 tones to create chords and melodic movement. I am just beginning to access the next layer of tones available. The sound is extraordinary. In some ways our ear and body must be trained to fully feel and grok the beauty and complexity of the tamber of the instrument. The Soundstone in many ways redefines musical categories.
The Soundstone is the memory of thousands and millions of years of the deep earth unleashed for singing in our modern physical world. Gabbro (related to granite) is often used for its vibrational qualities. It is a medium or coarse-grained rock that consists primarily of plagioclase feldspar and pyroxene and chemically equivalent to basalt.
For more information about the physics and metaphysics of the Soundstone please visit www.klangsteine.com