On May 29, 2010, at 2:14 PM, Daniel Schreffler wrote: > there is a note at the treble break that has the most hideous high > overtone. The fact that it is by the break may well be a good clue. It is very common to have problems there, and I think it has to do with the process of dressing the capo (initially at the factory). There is often a small curve (from the desired horizontal plane), making that unison particularly hard to mate. Either you have to remove some string(s) and dress that area of the plate (hard to do accurately unless all the strings are gone), or you have to custom fit the hammer by making the crown match the unevenness of the strings. I believe that many technicians, who are generally quite skilled and experienced, do not mate hammers and strings as precisely as they need to be (I am counting myself among that number). It takes a very light touch on the hammer (whatever way you raise it to the string, whether pulling up with a hook, pressing up with the jack, or laying felt on top of the reps). VERY light touch. Back off on pressure so that all the strings bleed just a bit. Press just enough so they don't, or so that one or more strings bleed a bit. It is really astounding how much of what we try to needle away comes from mis-mating. I have just spent two weeks at the Sauter factory, where the Klavierbaumeister heard every little lack of mating, said that was what it was, and demonstrated. I found that his touch was MUCH more sensitive than mine, and I thought mine was pretty sensitive. In any case, I think most "duplex noise" come straight from mating problems. That has been my experience. Regards, Fred Sturm fssturm at unm.edu http://www.createculture.org/profile/FredSturm http://www.youtube.com/fredsturm http://www.cdbaby.com/Artist/FredSturm -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100530/081030c5/attachment.htm>
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