They're going sharp, I tell you!

[Conrad Hoffsommer]

At 22:27 03/11/2002 -0800, you wrote:
>Just a general question from a relative newbie... What usually causes a
>piano to sharp between tunings? Going flat is completely understandable,
>from the string streching and/or pin loosening points of view, but what,
>other than maybe temperature or frame flexing, can make a piano go sharp
>over time?
>
>Thanks
>Greg Casper


It must be spring wherever you are.

you have...
-soundboard with actual crown
-Humidity up
-wood swells, increases crown
-increased crown pushes up on strings
-string tension (and pitch) go up.

reverse process in october...

Conrad Hoffsommer -  Decorah, IA
Usually I try to take it one day at a time, but lately several have 
attacked me at once...