<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Mar 22, 2008, at 6:03 PM, Jurgen Goering 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: 15px; 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; ">  On most pianos, the lowest few bi-chords benefit a different damper felt geometry than the thinner strings further up.  As well, on many pianos the bi-chords are more widely spaced down at the bottom, which is what my original query about the agraffe hole spacing was about.</span></blockquote></div> <span class="Apple-tab-span" style="white-space:pre"> </span>Yes, and really it is nice to have a range of narrow and wide. It would be lovely to be able to buy two or three different degrees of narrow/wide, all for the same piano. Steinway Ds need some extra narrow trichords for the bass wound trichords, completely different from the plain wire trichords above the break. <div><span class="Apple-tab-span" style="white-space:pre"> </span>It's a little hard to know how to measure. Unless you have a lovely custom tool for the purpose. I can see inserting a wedge and marking and miking, but that would be off by a bit. Are the thicker strings as wide as the space (one could see which one fit tightly)? I'm thinking you need to have a standard way of measuring if you are wanting to get usable results.<br><div><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br class="Apple-interchange-newline">Regards,</div><div>Fred Sturm</div><div>University of New Mexico</div><div><a href="mailto:fssturm@unm.edu">fssturm@unm.edu</a></div><div><br class="webkit-block-placeholder"></div></div></div><br><div></div></div></div></body></html>