[pianotech] Soundboard deflection - Pitch raise

[Ron Nossaman]

David Love wrote:
> Are you suggesting that soundboard deflection is the cause for the 
> predictable 25% - 30% loss in the initial pitch correction even when 
> that net change is similar whether pianos have no crown and no bearing 
> or quite a bit of crown and ample bearing?

Exactly. Just like soundboard rise and fall with humidity 
swings has very little to do with pianos going out of tune, 
soundboard deflection has very little to do with the pitch 
drop requiring overshoot when pitch raising. The required 
angle and load changes just aren't there.
Ron N