To prepare the hammers for the voicing process where experienced pianomen form the tonal qualities of the instrument the hammers have to be shaped which is done with a sand paper file..
The density of the felt is altered by sticking needles into the texture. Thus the the beauty of tone, the power and dynamic range of the instrument are brought out to their best.
All hammers are voiced individually.A special technique in their production is used to assure the elasticity of the felt . This is essential for the perfect sound and a large dynamic range.
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