Baldwin vertical hitch pin on Chickering

[John Delacour]

At 12:35 -0500 6/1/08, <pianoguru at cox.net> wrote:

>To my surprise, I found that making a slight change to the strings 
>of only one note could make a noticeable change in that note, 
>without effecting its neighbors much.  It's much more a local effect 
>than a general one.  I cannot explain why this is; this was just my 
>observation.

I'm surprised that you were surprised!  When you increase the 
down-bearing you alter the admittance at the bridge, which is what 
alters the tone, the sustain etc.  That's what down-bearing is for. 
Why should increased pressure on one unison have any effect on the 
others, since the increased pressure is not sufficient to alter to 
any appreciable degree the admittance at the point of contact with 
the bridge of the other strings?

If three people each press tuning forks close together against a 
table with equal pressure and then the person holding one of the 
forks presses harder, then then this person's fork is going to sound 
stronger.  The other two will sing just as before.

JD