S&S D Duplex

[Bill Ballard]

At 9:07 PM -0600 11/25/02, kam544@gbronline.com wrote:
>http://www.singingtone.com/movies/movie.html
>
>Takes awhile to load up with modem connection, but well worth the 
>wait for anyone who has an interest in "Where's the beef?"
>
>Thank you, Dan Franklin!

I agree. There is no doubt now that he has developed a technique for 
adjusting the Rear Duplex Length under a partial string load, and the 
tools to do that. When I get the chance to do this, I will probably 
head straight for the reference booklet listing the RDL "scales" for 
all of our common grand scales (at least those whose duplexes were 
intended to be tuned). There I would  derive the specific length of 
the RDLs. Once those were established, then I could be assured that 
any out-of-tuneness on either side of the bridge was simply a matter 
of equalizing tension across the bridge's friction barrier.

And in Burlington, he did demonstrate moving wire across the bridge 
with a tuning hammer.

But his criteria for harmoniousness was in both of my exposure to his 
technic, entirely aural and not linear at all. That still surprises 
me. As he explained to me in Burlington, "That's just the way I do 
it."

So thank you Dan for showing us a well-developed technique for tuning 
RDLs. I really think that if you posted the Rear Duplex Speaking 
Lengths for the Steinway M scale, you could easily get 8 or ten 
people to try it. (Right, David "the busted"?) You could look at it 
as seeding the ground. I for one look forward to your posting it, for 
the situation which I described earlier.

I think we're about to break some new ground here on the list, 
particularly when it comes to measuring the output of a piano.

Bill Ballard RPT
NH Chapter, P.T.G.

"May you work on interesting pianos."
     ...........Ancient Chinese Proverb
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