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. Hans Sander, RPT >>> rnossaman at cox.net 03/07/06 9:04 AM >>> > The only difference I can see between the three strings is the > placement of the bridge pins (nearness to front edge) and the differences > in the backlengths. As a totally uneducated guess, I'd choose the backlengths > as the culprit, especially in the capo sections. > > Does anyone know about this, instead of just speculating? > > Susan Kline Know, as in proving beyond a doubt to everyone on the planet - no, no one does. From available evidence though: You have overall string length, front bridge pin to tuning pin length, and various friction points. With humidity changes, speaking length pitch changes from bridge and pinblock movements reflect front bridge pin to tuning pin length differences first. Back scale and overall string length come in somewhat later because the friction at the bridge pins is greater than that at the capo (or whatever), and segment tension equalization lags behind there. Meanwhile, before the system stabilizes, the humidity is changing in the other direction, and it's going back to or past where it just was, confusing the neat and tidy indicators you thought you had by listening to the speaking length pitches. Bottom line is that until you have a way of measuring every variable in the system, both what they were then, and what they are currently, it can't be explained simplistically. Ron N _______________________________________________ caut list info: https://www.moypiano.com/resources/#archives -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20060307/1033a00f/attachment.html
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