Problems With Duplex Scaling Of Pearl River Grands?

[Richard Brekne]

I'm not sure I agree Terry. In your last post to Andrew you state

    "When we "detune" a front or backscale, don't we specifically try to
    avoid a fractional length of that note's speaking length to quiet
    the front and/or backscales?"

which implies it DOES make a "whit" if the back duplex is tuned to a 
specific relationship to the speaking length.  Once accepted that 
certain relationships to the speaking result cause clear and predictable 
acoustic results... you are immediately into a judgement call as to 
whether the results are desirable or not.

Strikes me that manufacturers are all out to make things as cost 
effective as possible... if the whole basic back duplex idea was totally 
ridiculous to begin with... no amount of marketing can account for the 
fact that so many manufacturers are wasting so much time, money and 
resources putting them in.  Another thing... when I stop to think about 
it.... I dont see any data supporting the idea that the basic Steinway 
back scale idea doesnt work.  I just hear a lot of claims.  Today I used 
a bit  of ekstra time tuning the top 6 notes on a C I service. I tuned 
the back lengths to exactly the same frequency as the  speaking 
lengths....  I got a very clear and definite improvement in sound. Much 
cleaner, increased sustain and volume.  At least thats what my ears told 
me, and it seemed pretty darned obvious. 

Cheers
RicB


    Indeed.

    Terry Farrell

    ----- Original Message -----
     >> /"On any given string, the duplex segment will not match the
    pitch of the
     >> speaking segment of the sting. (It cannot because these two
    segments are
     >> different lengths)."/
     >>  Since when? I mean, assuming the duplex segment was somewhere
    close to
     >> being "tuned".
     >>  Terry Farrell
     >
     >
     > If any rear duplex segment lengths match their speaking lengths,
    it's only
     > going to be in the top octave. Lower down, the speaking segments
    get too
     > long. And for that matter, why should it matter a whit if the
    rear duplex
     > is any direct relationship to it's speaking length? It'll be just as
     > "tuned" if it's pitch matches something somewhere up or down scale.
     > Ron N
     >


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