Soundboard Resonances and the Wogram Article

David Love davidlovepianos@comcast.net
Sat, 4 Feb 2006 13:11:13 -0800


This is going a bit off track from my point.  I'm not really talking about
randomness or unpredictability in the way you mention, I'm really talking
about controlled randomness as it were and it's more to do with overall
tonal impressions, how the board seems to move and breath than with whether
or not there will be success in crowning it, eliminating awkward scale
problems, relocating bridges or other details that, I agree, need to be
addressed frequently.  I realize this is a totally qualitative attribute and
nothing I am able to address in any kind of technical way.  That makes it
difficult to discuss, I realize, so I am putting it out at my own risk in
the hopes that someone without a particular ideology will try and address
just what it is I might be hearing and why.  I've been party to several
redesigns now with RC&S boards and the results have been good.  I will
continue to use that method because results are more predictable and because
many of the irritating quirks can be remedied that are often not on
traditional types of boards that I've heard.  The sound is very controlled
and focused.  Sustain is improved.  I'm not really arguing those points.  In
fact, let me go farther to say that there is a difference between RC&S
boards with full cutoffs and compression boards without to my ear.  The idea
that an RC&S and compression crowned boards are simply two different ways to
get to the same result is, in my experience, not really the case.  They are
different.  That difference has everything to do with a more controlled
tone, a tighter sound.  To many people, maybe to most, that is a desirable
thing.  If there is a criticism, and to many this would not be a criticism,
it is that the boards can feel overcontrolled, that they might lack a
certain freedom especially at the forte end.  Sometimes you want the board
to growl a bit at the upper end of the dynamic range.  This type of effect
can sometimes be difficult to achieve on these boards.  Now maybe that's the
case with any new and successful board.  But that's not been my listening
experience.  What I am trying to put my finger on is whether placing the
bridge exactly in the middle of the panel with the addition of a full cutoff
bar doesn't contribute to that phenomenon by virtue of how the resonances
otherwise set up, as the Wogram article suggests, when the placement is not
exactly on center.  Judging from the diagram and the movement in the bass
corner of that panel, I have to assume that the piano he measured did not
have a cutoff bar of any type.  So, if so, is there any merit to placing the
bridge slightly off center by adding a smaller cutoff.  I'm not sure the
question can be answered, but it's an honest one without any particular
agenda.       

David Love
davidlovepianos@comcast.net 

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Ron Nossaman
Sent: Saturday, February 04, 2006 11:44 AM
To: Pianotech List
Subject: Re: Soundboard Resonces and the Wogram Article



> I don't think false beats are quite the same thing as an oscillating
> resonance which seems to take place mostly (if I read the diagram
correctly)
> in the lower frequencies.  

No, they aren't, but what parts of chaos do we get to chose?


>  My assumption is that the pattern
> produced will be more uniform and predictable.  

With the cutoff? Yes, that's the intent, and seems to be the 
result.


>But sometimes
> unpredictability and randomness can be a positive thing.  So my question
is
> first, if that's the case, and second, if so, what are we trading for what
> and is it something that's worth considering?
> 
> David Love

Why would you think I haven't considered it? Considering it is 
exactly what got me here. Personally, I don't like random 
surprises when I have so much time and expense invested in 
building a board and stringing it before I know what I've got. 
I had quite enough of that sort of thing through the years 
building more conventional boards by conventional methods 
guided by conventional wisdom and reproducing the problems as 
faithfully as I was able. I like this a lot better, and am 
quite thrilled and grateful to be able to trade so much of the 
voodoo guesswork of the conventional method for what I'm doing 
now, and I very much like the result. If I didn't, I would 
still be using the old methods and wisdom and getting the same 
annoying and disappointing results. Those of us doing this 
sort of work aren't noticeably endangering the world piano 
manufacturing process. There is still plenty of random out 
there for everyone who is interested, and doesn't like what 
the redesigners are doing, and I don't consider the 
possibility that if what I'm doing doesn't produce the sound 
people are used to hearing in pianos, I might want to 
reconsider my approach. As I said, I personally like the 
results, as do others who have heard them. I'm doing this 
quite intentionally and methodically, for what I consider to 
be far more valid reasons than maintaining the status quo. And 
I'm always learning something new, and think everyone should. 
I WANT people to hear something they're not used to hearing. 
They might just get ideas.

Ron N
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