Long-term flattening (word?) tends to be fairly even in a piano in good shape. But seasonal pitch changes are often different in different areas of the piano, as you describe. The preceeding factoid is based soley on my observation--if threatened, I shall disavow any knowledge of any thing. No one who knows me would question my ignorance. Alan R. Barnard Salem, MO -----Original Message----- From: Charles Neuman [mailto:piano@charlesneuman.net] Sent: Friday, January 23, 2004 1:06 PM To: pianotech@ptg.org Subject: Terry Farrel: A440 or bust! (Or not.) That reminds me: Around these parts (Long Island), it's really cold outside and dry heat makes pianos flat. I understand it is common to leave the piano a little flat in the winter and a little sharp in the summer. How much is an OK amount to be flatter than A440? Also, on a recent tuning I did, different parts of the piano were flat by different amounts. In the temperament region, it was flat by about 15 cents. In the upper treble and parts of the bass, the strings were only a couple cents flat, if any. Some were even sharp. I suspect the previous tuner hadn't stretched the piano much. On the other hand, could this have been due to the change to the dry environment this winter? Charles Neuman PTG Assoc, Long Island --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 10/9/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 10/9/2003
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