The Duplex affect --an experiment

[Porritt, David]

Well, of course that was my point.  From my observations - admittedly
not double blind studies - I have not missed anything nor did I want any
sound I couldn't get by traditional voicing techniques.  
I'll admit that the front duplex does make a difference.  It's just that
it's not a difference I want to keep at the expense of not being able to
control the sounds it makes.

dp

David M. Porritt, RPT
dporritt at smu.edu

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
Behalf Of Ron Nossaman
Sent: Wednesday, November 14, 2007 11:19 AM
To: Pianotech List
Subject: Re: The Duplex affect --an experiment


> It's natural to want the impossible so here goes.  I wish we could
test
> whether the "duplex sound wonderfulness" could be duplicated without
> front duplex by normal hammer voicing.  In other words, if there is no
> front duplex do we lose something that can't be replaced by control of
> the hammer.
> 
> dp

You have one there with the tuned duplexes eliminated, what do 
you think? Do you miss the duplex sound wonderfulness? The 
SD-10-B I did for Bob Hull has an effective front duplex 
segment length of about 10mm. Neither of these duplexes make 
noise that I can detect, and to my ear, both pianos sound 
better than new stock. So what's a tuned front duplex that's 
intended to make noise for, exactly?
Ron N