This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Kent - What a great discussion this is. What is most amazing to me is how you got those graphics into your computer and to us. *How did you do that???* Don Kent Swafford wrote: > On Jan 9, 2006, at 10:57 AM, BobDavis88@aol.com > <mailto:BobDavis88@aol.com> wrote: > >> Not meaning to embarrass anyone, but just to avoid confusion to those >> learning the trade, this is not correct. A perfectly tuned 440 A4 on >> the piano produces a second partial which is slightly sharp of 880. >> IF the fork produces 880 at A5 (which has recently been called into >> question), we would have to bring A4 DOWN (under 440) to match its >> 2nd partial to the fork's 2nd partial. >> >> Bob Davis > > > > Who just said this subject was easy? 8^) > > Let's see if I can get it right. Here are a few readings taken this > morning of a John Walker A fork and a Yamaha grand. They show that Bob > is correct. No obfuscations. No smoke and mirrors. > > The first attached graphic shows an RCT Pianalyzer readout of an A4 > tuning fork. Note that the Inharmonicity column shows uniformly zero > inharmonicity. > > > > The second attached graphic shows an RCT Pianalyzer readout of a > piano's A4. If the 2nd partials from the two graphs were tuned > together (as would be the case using F3 as a test note to tune the two > together), then there would be a 1.2 cent offset at the fundamental. > That is, if the piano A's 2nd partial were tuned down to match the 0.0 > of the fork's second partial, then the piano's A would be flat by 1.2 > cents. > > If this were on the PTG tuning exam, the examinee would have used up a > substantial portion of the tolerance in doing so. Please use F2 to > match the fundamentals of the pitch source and the piano's A when > setting pitch. > > > > > > Kent > ---------------------- multipart/alternative attachment --------------070304030004070504010003 An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/15/f7/c7/59/attachment.htm --------------070304030004070504010003 A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 31641 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/68/07/58/81/attachment.jpe --------------070304030004070504010003 A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 29374 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/43/82/0e/2c/attachment.jpe --------------070304030004070504010003-- ---------------------- multipart/alternative attachment--
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