<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> Jurgen and Jack,<div><br class="webkit-block-placeholder"></div><div>I have always found that thinning the shank raised the pitch. I tried yesterday to lower the pitch by thinning the shank and couldn't do it. The pitch went up every time I thinned a shank. </div><div><br class="webkit-block-placeholder"></div><div>Perhaps Bluthner has a method that is different?</div><div><br class="webkit-block-placeholder"></div><div>Tim Coates</div><div><br class="webkit-block-placeholder"></div><div><br><div><div>On Feb 21, 2008, at 8:06 PM, Jack Houweling wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><pre>Jurgen,</pre><pre>Could you tell us what tool they used and also did they support</pre><pre>the shank while scraping in any way? Or was it done outside</pre><pre>of the action?</pre><pre>Jack Houweling</pre><pre> </pre><pre>Thinner shanks will be more flexible and less stiff, hence they will have a resonating frequency. I saw techs "smoothing out" the shank frequencies in the Blüthner factory, They would sort shanks so that similar sounding ones were together. If one shank stood out, they could lower its pitch by thinning the shank through judicious scraping. The pitch could only be adjusted downward. Jurgen Goering </pre></span><br class="Apple-interchange-newline"></blockquote></div><br></div></body></html>