[CAUT] Capstan relocation questions

David Ilvedson ilvey at sbcglobal.net
Sun May 9 11:06:13 MDT 2010


Well, there's always magic...

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Peter Sumner" <petersumner at mac.com>
To: caut at ptg.org
Received: 5/9/2010 8:45:15 AM
Subject: Re: [CAUT] Capstan relocation questions


>The piano is an instrument..the post below acknowledges this and treats it as 
>such...great points...
>Theoretical exercises are absolutely beneficial in explaining and understanding 
>mechanical relationships...BUT when a pianist plays they have no thoughts about 
>theory...they are playing, lost in the music...hopefully...
>As each pianist brings something individual how can we prepare pianos that give 
>them the best chance to express their musicality?...does working from mechanical 
>theories alone produce what they want....?

>Yet another idle thought...
>P
>On May 9, 2010, at 8:14 AM, David Love wrote:

>> I don't know about differences in the hand but there are differences
>> depending on where you play the key.  You could make an argument that since
>> when the black keys are played along with the white keys it tends to be
>> farther into the white keys.  Because the action ratio changes depending on
>> where you play the key (it gets higher as you move toward the balance rail)
>> then with a higher sharp ratio you might have greater uniformity in actual
>> playing.  So what does a pianist notice?  It's impossible to say.  Much
>> seems to go unnoticed often.  In reality the touch weight dynamics as they
>> relate to action ratios are rarely uniform in practice to the pianist
>> because they don't really play any two notes in the same proximity to the
>> balance rail.  While making the ratio between sharps and naturals equal
>> makes sense on one hand, a varying action ratio between the two within
>> reason probably goes unnoticed.  What pianists notice is predictability.  If
>> the key(s) respond as they expect the will before they play the note they
>> will be happy assuming things are set up within reasonable specifications.
>> If they have no was to assess what to expect in anticipation of playing a
>> note or group of notes, they will be unhappy.  
>> 
>> David Love
>> www.davidlovepianos.com
>> 
>> -----Original Message-----
>> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Mark
>> Dierauf
>> Sent: Sunday, May 09, 2010 7:14 AM
>> To: caut at ptg.org
>> Subject: Re: [CAUT] Capstan relocation questions
>> 
>> Many thanks, Ron - your insight is much appreciated. As to your last 
>> point, my concern is whether this will feel noticeably different to a 
>> concert level pianist. I may decide, from a purely technical point of 
>> view, that identical ratios between sharps and naturals are preferable, 
>> but that doesn't necessarily make the pianist happy. It does seem 
>> perfectly plausible to me that, given the physiological differences 
>> between the individual fingers of the hand and the empirical origins and 
>> long history of the keyboard (and the compositions written for it) that 
>> there might actually be a compelling argument in favor of differing 
>> ratios. What I'm wondering is simply whether or not pianists have 
>> noticed the difference between these two setups and whether their 
>> reaction was favorable or not.
>> 
>> - Mark
>> 
>> Ron Overs wrote:
>>> <div class="moz-text-flowed" style="font-family: -moz-fixed">Mark,
>>> 
>>>> . . . The "magic line" at half-stroke: WNG is recommending using 
>>>> different heels for the sharps to maintain this, but I'm a little 
>>>> concerned about how this will actually feel in the finished action.
>>> 
>>> I've been doing this since 2000 when fitting our action. Very often 
>>> the spacing between the two balance pin lines, for the black and white 
>>> keys, is incorrect, so the capstan line might need to be located 
>>> differently for the black and white notes.
>>> 
>>>> After all, pianists have spent the past three centuries getting used 
>>>> to slightly different touch characteristics between sharps and 
>>>> naturals, and I want this action to feel good, not unusual.
>>> 
>>> If feeling unusual means that the hammer/key ratio is the same for 
>>> both black and white keys, then I'd prefer it to feel unusual.
>>> 
>>> Ron O.
>> 


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