humidity drops, pitch goes up?!

[baoli liu]

Piano needs time to breath in/out moisture and then
changes it's pitch gradually.

earlier summer,this piano had started to raise it's
pitch,but not raise too much;

earlier winter,this piano has started to lower it's
pitch,but not lower too much yet.

That's my guess.
Baoli

PS:the cooler temperature can raise the pitch a little
bit.





--- Ron Koval <drwoodwind@hotmail.com> wrote:
> New one for me:
> 
> Here in the midwest, it's common to see all the
> pianos tuned over the summer 
> needing pitch raises now, as the heat has been on
> for awhile and the 
> humidity has dropped.
> 
> Petrof 7' in a church, I'm reasonably sure that I'm
> the last one that tuned 
> it on 6/8, where the humidity was around 45%.  Just
> went there for the xmas 
> tuning, humidity was under 30%, but the piano was 10
> cents sharp........ 
> kinda chilly in there, around 64 degrees - anyone
> out there care to hazard a 
> guess?  No D/C system installed.
> 
> Beats me
> 
> Ron Koval
> 
> 
> 
> 
> 
>
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