Its the hammers that change with season too. Mostly ! Take five techs and have them knock on a table with a finger, they all will have their own knock ! (Yamaha trick to undestand the importance of the playang hand when tuning) Have a nice day anyone ! Isaac > -----Message d'origine----- > De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part > de Newton Hunt > Envoyé : mardi 30 octobre 2001 01:44 > À : pianotech@ptg.org > Objet : Re: Chaning Inharmonicity > > > > I don't believe this has ever been demonstrated conclusively. > > I have experienced this, for years. I have tuned the same concert > grands every week, sometimes for years, and I have measured the FAC > numbers time after time after time. The "A" changes three to four cents > from one season to the other, and it does effect the way the piano is > tuned. > > Try it yourself. Keep a record of FAC numbers then six months later > take them again. You will know then.. > > I am _good_ at taking the measurements so I know it is not me, it is the > piano. > > Newton >
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