Hmmm, Perhaps the A hasn't been stable if it's right on when you do your FAC. FAC has you tuning A4 to it's second partial at A5. It sure as sugar will be different than A4 measured at A4 as when you first turn the machine on and press the "tune" button. Bottom line is if you set a stable A4 tuned to A5 for the FAC readings, you will have to move it when you come back over it with a calculated tuning. It might not be much, but it will be there. Make sense? William R. Monroe On Wed, Aug 5, 2009 at 5:02 AM, David Nereson <da88ve at gmail.com> wrote: > > David, >> >> Don't forget that after you've offset the pitch, you've then gone through >> the FAC procedure which requires you to tune A4 at it's second partial >> (A5) >> and then read it at A6 to get the A offset. In other words, you've >> changed >> that A4 that you measured to offset pitch when you established the FAC >> numbers. So, the fact that A4 is now flat is because you've changed it >> from >> where it was, no? Did I miss something? Hope that helps. >> >> William R. Monroe >> >> > > Yes, I'm aware of that, but I don't usually have to alter A much at all > when setting the FAC numbers. Sometimes, after offsetting the pitch with > the Cents Up/Down and Reset buttons, when I get to A, the lights are barely > moving at all (meaning that particular string doesn't have much > inharmonicity, as I understand it). I have yet to try people's suggestions > -- I've been involved with other things the last few days. Thanks all, for > the replies. > --David Nereson, RPT > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090805/16ee0139/attachment.htm>
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