---------------------- multipart/alternative attachment Hi Jason, Back up a moment, the topic was originally noisy and aggressive capo bars, tuning duplexes is a whole different topic. Most are designed to be de tuned, and on rear duplexes, which only add a marginal amount to the tone quality, if all three strings are singing at the same pitch, that's usually good enough. With sectional duplex bars, there's not a lot the average tech can do, other than rub them out so they are even. Most forward duplexes are cast in the plate and again, it's limited as to what can be achieved. When voicing, you aim for the forward duplex to sing but not sing through, so as to be obnoxious, and obvious. Next is to make sure the strings are rendered evenly, with lots of plucking and re tuning. To raise the pitch of the rear duplex, rub down the speaking length of the string with a hammer shank, or brass rod, then re tune. To lower the pitch rub out the duplex and hitch pin segment, then re tune. then compare the 3 duplex strings, then start again. It is a slow a laborious job. With the front duplex, rubbing or seating it, will make the speaking length go sharp, Often at this end, friction and rendering is the cause of problems, along with the design. I have de tuned many a forward section with a little dab of white glue to add mass to that string segment. It will still sing, but not be annoying, and not dead like adding felt, Ron Overs piano, is the best I have seen to date, that has control over the duplex voice. Each note has a movable bearing bar. A piano like this is sure worth spending a lot of time on. Is this what you were looking for? Regards Roger At 06:04 PM 9/3/02 -0700, you wrote: >Thanks, all, for responding. But I'm puzzled ... the duplex is there for a >design reason, after all, which I presume is to create additional >harmonics and add to the esthetic quality of the tones. Sounds like the >universal consensus is that the duplex is generally more trouble than it's >worth. *Not one* of you ever retunes the duplex??? (I say this without yet >having checked the archives for Ron Overs on "detuning the duplex" but the >title appears to substantiate my guess here.) ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0e/7a/6e/a6/attachment.htm ---------------------- multipart/alternative attachment--
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