what is downbearing?

[Alpha88x@aol.com]

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Greetings,

           What exactly is downbearing? Does it affect the sound of the piano 
or is it a mechanical/ physics measurement for the playability of the piano? 
Why is it important to measure it? Can it be calculated by a formula(e)? What 
does it mean?


Thanks,
rookie,
Julia Gottchall,
Reading, PA

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