Tuning the Duplex (was ...Capo)

[Jason Kanter]

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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.)
  ----- Original Message -----=20
  From: Baldwin Yamaha Piano Centre=20
  To: pianotech@ptg.org=20
  Sent: Tuesday, September 03, 2002 4:39 PM
  Subject: Re: Tuning the Duplex (was ...Capo)



  Hi Alan,
                 It's not some thing you can generally see, and you are =
not pulling or pushing the string that hard.  The massage is done just =
2" in front of the capo, to the capo bar.=20
  I also usually give the bridge pins a tap with a set punch, when you =
have a piano as described, this also cleans up a lot of false beats, and =
increases sustain, and cleans up the tone.
  I wrote an article, Titled,  Prelude to Voicing, last year in the =
Journal.  If you apply all those techniques, you will find many tone =
problems disappear, and the piano may need less voicing.
  At times, I think we are guilty of going for the needles, when there =
is other solutions.
  Needling can at times hide a multitude of sins.  The real skill comes =
when you know when to cheat.
  Ops! Did I say that.  <G>
  Roger

  At 05:33 PM 9/3/02 -0500, you wrote:

    Thank you and I trust and will try what you say, though I wasn't the =
person with the duplex complaint.
    =20
    I am mystified, a little, though. It seems like the strings, up =
against the capo, are as high as they could get.=20
    =20
    Would this not also tend to make the string rise off the bridge a =
little?
    =20
    Alan Barnard
    Salem, MO
     =20
      ----- Original Message -----=20
      From: Patrick C Poulson=20
      To: pianotech@ptg.org=20
      Sent: Tuesday, September 03, 2002 1:43 PM=20
      Subject: Re: Tuning the Duplex (was ...Capo)


      Alan: Roger is referring to the practice of using a string hook to =
lift and level all the strings, so that they make firm contact with the =
capo bar and are level.  Using the string hook of your choice, put the =
hook under the string right in front of the damper and pull towards the =
capo bar, lifting slightly as you do so.  Do all three strings and check =
that they are level.  The strings will typically drop in pitch and =
improve in tone when retuned.  It will eliminate some if not all the =
duplex noise.=20
      Patrick Poulson, RPT

  Roger=20

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