Long term pitch drop, was: Type O

[Ron Nossaman]

> How do those glass-soundboard pianos hold up, pitch-wise?
> 
> Alan Barnard

I don't have one to evaluate - but - soundboard rise and fall, 
according to the admittedly crude calculations I'm capable of, 
have very little to do with the observable pitch changes we 
can easily enough measure in pianos, so if the bridges and pin 
block are of a "standard" configuration, I wouldn't expect 
them to be significantly more stable.

I have observed, and verified second hand from the keepers of 
pianos I've done for others, that epoxy laminated veneer 
bridge caps have a positive effect on both tuning stability 
and false beat elimination.
Ron N