Duplex

[Farrell]

Hello Duplex Dan. I am not Dave, but I do care for a lovely 90-year-old
Baldwin R with a duplex scale. I did not realize they could be moved/tuned.
I have not measured their lengths. I would love to be able to tune them.
This is a marvelous piano (nicer than a new Steinway L that I tune), and the
thought of making it even more so is quite exciting! I would appreciate any
info you might be able to share. Thanks.

Terry Farrell

----- Original Message -----
From: <Duplexdan@AOL.COM>
To: <pianotech@ptg.org>
Sent: Friday, October 26, 2001 2:14 AM
Subject: Re: Duplex


> Dear Dave,
>
> Does the Baldwin have a Duplex Scale?
> If so, have you checked the intervals of the duplex scale against the
> speaking length? Are the intervals double octaves, octave and a fifths,
> octave and fifth? Or are they, as I suspect jarring intervals such as
major
> sevenths, flat ninths, flat fifths and augmented fifths? If so, they
> absolutely shoud be tuned to the corresponding partial.
>
> Old Baldwins were made with triangular shaped oliquots, before the
acu-just
> system went into effect. All of these vintage pianos with adjustable
oliquots
> were designed to have a specific duplex scale tone that coordinated with
the
> tone of the speaking length. The moveablility of these oliquots was
> incorporated to allow for this tuning process.
>
> Tuning the duplex scale of any and all of these pianos can unquestionably
> improve the tone of the piano in particular regard to the quality of tone
and
> the sustain.
>
> May I remind you that this is not my idea; it is, was and always will be
CF T
> Steinway's, who has the original patent, 126848.
>
> If you would like more information about how to tune a duplex scale
desingned
> piano, I would be delighted to provide you with any info I have, which is
> considerable.
>
> Hope I can be of help.
>
> Dan Franklin, RPT