You'd have to look up the formula in Roberts (or equivalent) for inharmonicity which takes into account the unwrapped portion (I think his formula calculates for 1/2" on each end. Increase that part in the formula and compare. A smooth inharmonicity curve within each section is desirable. Answering the question of "how much difference" is difficult as there are theoretical versus the practical differences. While the goal of perfect uniformity within and between unisons is a good one to shoot for, small differences (< 1/4") are probably not worth losing any sleep over in terms of tuning problems. The greater the difference the greater potential but there are other factors involved such as string versus wrap diameters and the overall length of the string. How it looks is another matter. Uneven windings look sloppy and reflect on your work--even if you didn't do it and even if it sounds ok. Certain string winders are better than others in this area and certain technicians are better at measuring hitch to bridge pin distances and speaking lengths. Unless you measure accurately you won't get accuracy from the string maker. Making and sending off paper patters is for dinosaurs. David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Jason Kanter Sent: Tuesday, October 03, 2006 9:41 AM To: Cy Shuster; Pianotech List Subject: Re: Formulae for String Calculations Mismatched, yes. But given that they are matched, how much difference does the length of the bare ends make? Jason ----- Original Message ----- From: "Cy Shuster" <cy at shusterpiano.com> To: "Pianotech List" <pianotech at ptg.org> Sent: Tuesday, October 03, 2006 9:10 AM Subject: Re: Formulae for String Calculations > David Sanderson told us that the bare length is critical to inharmonicity. > Mismatched bare lengths on wound bichords is a real tuning problem. > > --Cy-- >
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