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<DIV><SPAN class=792570010-22082004><FONT face=Arial color=#0000ff =
size=2>Hi
Sarah, thanks for catching on this, I hope this will open a nice thread. =
No I
look for that old helmet of mine !</FONT></SPAN></DIV>
<DIV><SPAN class=792570010-22082004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=792570010-22082004><FONT face=Arial color=#0000ff =
size=2>Isaac</FONT></SPAN></DIV>
<DIV><SPAN class=792570010-22082004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma><FONT
size=2><SPAN class=792570010-22082004><FONT face=Arial =
color=#0000ff>PS Indeed
hammers in the treble does not relate to string mass at all, certainly =
for
facility reasons.</FONT></SPAN></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=792570010-22082004></SPAN></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma><FONT
size=2><SPAN class=792570010-22082004><FONT face=Arial =
color=#0000ff>I recall
little have been experimented on the ration hammer mass/unison mass, but =
I've
heard of some studies</FONT> </SPAN></FONT></FONT><FONT =
face=Arial
color=#0000ff size=2>.</FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial
color=#0000ff size=2></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2>M<SPAN class=792570010-22082004>y =
questioning is that
on some particular designs is not the evening of the break taking =
in
account the jump in hammer mass and strings mass if exists - or not ? =
(even by
trial and error)</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>Bernhard =
stated that
the longer hammers in the bass are less efficient in a grand and create =
a
noticeable loss in power if compared with verticals, also. In that =
regard,
adding weight to the first plain wire hammers, should exacerbate that =
effect,
that was may be the concern I noticed on the Steinway I talked the =
weight off
(no certitude there, of course, was a few years ago, many things have =
changed
since then !).</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>As a =
tuner/technician,
I sometime find more easy to even the heaviness perception -that is so
subjective as linked to tone- working the tone (voicing and =
regulation
eventually) but we have little mastering of the basic tonal output power =
(strings/soundboard/hammer mass), only how efficiency these =
possibilities
are employed.</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>BTW on =
another subject
, I recall having tuned a grand D Steinway to "mask" or absorb totally =
the
attack noise (it is possible) .</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>The =
pianists have find
the tone very smooth and even, but it was lacking power and totally =
dynamic, and
did not allow nuances enough (a smooth singing tone with little =
dynamics, not
bugly but not interesting for music).</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>Now I =
energize the
attack so the impact serve tone while it is less masked . The way =
it
transforms in ringing is where is all the "secret" of a good
tone.</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>Best
regards.</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004>Isaac</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>P.S I'll =
be
unsubscribing for a while, the list is taking too much of my time when I =
participate. I'll be back certainly.</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN class=792570010-22082004>Best to =
anyone, I wish
you a good beginning of the school =
days.</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004>Isaac</SPAN></FONT></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Arial><FONT
color=#0000ff><FONT size=2><SPAN
class=792570010-22082004></SPAN></FONT></FONT></FONT> </DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma><FONT
size=2><SPAN class=792570010-22082004> </SPAN>-<SPAN
class=792570010-22082004><FONT face=Arial
color=#0000ff> </FONT></SPAN></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma
size=2><SPAN class=792570010-22082004> </SPAN>----Message
d'origine-----<BR><B>De :</B> pianotech-bounces@ptg.org
[mailto:pianotech-bounces@ptg.org]<B>De la part de</B> Sarah
Fox<BR><B>Envoyé :</B> dimanche 22 août 2004 =
07:31<BR><B>À :</B>
Pianotech<BR><B>Objet :</B> SW heresy?<BR><BR></DIV></FONT>
<DIV><FONT face=Arial size=2>Hi all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for the advice about techniques =
to even out
the SW curve! That should give me a variety of techniques to =
use/combine
in order to even out the jags.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>But the question is one of what my =
target curve
should *really* be. Hmmmm.... My thoughts:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The unmodified SW curve is =
obviously
very linear. (Yes, I know what linear means. I =
"minored" in
mathematics, sort of -- except that my U. didn't officially recognize
minors). Stanwood's curves, OTOH, are all concave =
downwards.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I was advised off list that I shouldn't =
force the
hammers to artificially conform to a standardized Stanwood curve but to =
simply
even out the jags to make the action smooth from bottom to top. =
There's
something to be said for this idea.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>But as I got to thinking about the SW =
curves, I was
wondering, where do they REALLY come from? That is, where does the =
shape
come from? I suspect the hammer manufacturing people might be able =
to
enlighten me as to this. (Ray???) I'm *guessing* that the =
felt is
denser than the molding, and when the hammer becomes skinnier, it loses =
more
felt than molding, resulting in a more precipitous dropoff in =
weight at the
higher end. This would occur with a constant hammer length and a =
linear
variation in hammer and molding (and felt) width. Am I anywhere =
close on
this idea???</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Contrast this function with other =
functions that
might actually relate to optimal hammer mass: String length and =
mass both
decrease with the note number, with a function that is concave =
upwards.
Note frequency increases with a function that is concave upwards. =
Note
period (inverse of frequency) increases with a function that is concave
upwards. The Stanwood curve seems rather meaningless with regard =
to any of
these functions. For instance, it might be good to match hammer =
mass to
string mass by some proportion. Right? As the scale goes up, =
string
length and mass approach an asymptote of zero. Therefore, =
shouldn't hammer
mass approach an asymptote of zero? Instead, the curve starts =
taking a
dive in the treble. If the scale went up well past 88, hammer mass =
would
eventually crash to zero. Because these curves do not have the =
same form,
the relationship between hammer and string mass is anything but =
constant.
That doesn't make sense.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So is this something that is the way it =
is just
because of tradition -- because the cauls are built that way, and that's =
what
ya' get? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now that I look at my linear SW curve =
(with jags),
I'm wondering if this isn't REALLY a closer match to something =
meaningful (like
string mass) than the idealized Stanwood curves. Any thoughts,
y'all?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Peace,</FONT></DIV>
<DIV><FONT face=Arial size=2>Sarah</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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