For this door chime we use miniature plate bells made from nickel silver,
which are just like gong oblong tuned to two octaves,
with a base note corresponding to the year-tone of the Earth (a=432Hz).
The bells sound out major triads with the tonalities corresponding to the zodiac signs after the method of Friedrich Oberkogler.
They are brought to sound by spheres of gem stone, which are also chosen to correspond to the zodiac.
For sound samples please click on the green icons