[CAUT] CAUT Digest, Vol 27, Issue 126

[Roger Jolly]

At 01:06 PM 1/29/2011, you wrote:
>I've seen the pianos go sharp when the A/C comes on, flat when the heat 
>comes on.  I suppose it the metal parts (plate and strings) expanding and 
>contracting.

The metal parts are purely temperature dependent, and are not effected by 
humidity. So if the temperature is steady, it's a humidity issue.

Regards Roger