<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV><DIV>On Jan 9, 2006, at =
10:57 AM, <A href="mailto:BobDavis88@aol.com">BobDavis88@aol.com</A> =
wrote:</DIV><BLOCKQUOTE type="cite"><DIV style=""><FONT =
class="Apple-style-span" size="4"><SPAN class="Apple-style-span" =
style="font-size: 16px;"><FONT class="Apple-style-span" =
face="Bookman Old Style">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.</FONT></SPAN></FONT></DIV><DIV style=""><FONT =
class="Apple-style-span" face="Arial" size="4"><SPAN =
class="Apple-style-span" style="font-size: =
16px;"> </SPAN></FONT></DIV><DIV style=""><FONT =
class="Apple-style-span" size="4"><SPAN class="Apple-style-span" =
style="font-size: 16px;"><FONT class="Apple-style-span" =
face="Bookman Old Style">Bob =
Davis</FONT></SPAN></FONT></DIV></BLOCKQUOTE></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>Who just said this subject =
was easy? 8^)</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>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.</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>The first attached graphic =
shows an RCT Pianalyzer readout of an A4 tuning fork. Note that the =
Inharmonicity column shows uniformly zero inharmonicity.</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV><IMG =
src="cid:A463A265-9411-4DE5-886C-2AC99096A9CC@local"></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>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.</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>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.</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><IMG =
src="cid:18F41C35-9BA6-4580-AB63-1BC245738F23@local"><BR><DIV></DIV><DIV=
><BR class="khtml-block-placeholder"></DIV><DIV><BR =
class="khtml-block-placeholder"></DIV><DIV>Kent</DIV><DIV><BR =
class="khtml-block-placeholder"></DIV></BODY></HTML>=