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<DIV>Most likely no backlengths, no physical movement of the strings at all just the soundboard with the bridge and the strings on top of it either sagging a 1/1000 of a mm or raising with added humidity, and then think about the position of your unisons on the bridge from left to right that adds another 1/1000th of something in difference and last but not least, your soundboard is supposed to be crowned mostly in the middle. </DIV>
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<DIV>Hans Sander, RPT <BR><BR>>>> rnossaman@cox.net 03/07/06 9:04 AM >>><BR></DIV>
<DIV style="COLOR: #000000"><BR>> The only difference I can see between the three strings is the<BR>> placement of the bridge pins (nearness to front edge) and the differences<BR>> in the backlengths. As a totally uneducated guess, I'd choose the backlengths<BR>> as the culprit, especially in the capo sections.<BR>> <BR>> Does anyone know about this, instead of just speculating?<BR>> <BR>> Susan Kline<BR><BR><BR>Know, as in proving beyond a doubt to everyone on the planet - <BR>no, no one does. From available evidence though: You have <BR>overall string length, front bridge pin to tuning pin length, <BR>and various friction points. With humidity changes, speaking <BR>length pitch changes from bridge and pinblock movements <BR>reflect front bridge pin to tuning pin length differences <BR>first. Back scale and overall string length come in somewhat <BR>later because the friction at the bridge pins is greater than <BR>that at the capo (or whatever), and segment tension <BR>equalization lags behind there. Meanwhile, before the system <BR>stabilizes, the humidity is changing in the other direction, <BR>and it's going back to or past where it just was, confusing <BR>the neat and tidy indicators you thought you had by listening <BR>to the speaking length pitches. Bottom line is that until you <BR>have a way of measuring every variable in the system, both <BR>what they were then, and what they are currently, it can't be <BR>explained simplistically.<BR>Ron N<BR>_______________________________________________<BR>caut list info: <A href="https://www.moypiano.com/resources/#archives">https://www.moypiano.com/resources/#archives</A><BR></DIV></BODY></HTML>