[pianotech] Steinway A Bass String Rescaling

[David Love]

It's that judgment that I'm interested in.  I go back and forth as well.
The best "spreadsheet" fit often involves a fairly radical shortening of the
speaking lengths such that the original designs that employed that modified
the strike point with a new agraffe line.   I'm not interested in doing that
and so have kept my own modifications of the speaking lengths more
conservative although that tends to cause a drop in the inharmonicity curve
and an increase in the BP% farther than I would normally go.  Spreadsheet
also don't always necessarily make for perfect tonal transitions for reasons
unknown to me, even though they are certainly better than the precipitous
tension drop offs characteristic of the original.  Are you totally satisfied
with the tonal characteristics of the transitions and, if not, how would you
characterize the tonal differences that you experience across those breaks
(difficult to answer I know).

David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Tuesday, May 26, 2009 9:44 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Steinway A Bass String Rescaling

David Love wrote:
> The discussion I would like to see is an analysis of various types of
> transition bridges especially with respect to jumps in inharmonicity that
> can happen and how much of a jump can be tolerated without creating real
> tuning problems.  


It's been my experience that when you get to make your own 
bridges and string scale, you can get smooth transitions in 
tension, Z, and inharmonicity all at once. This is at the 
expense of break% transitions.

I don't know how anyone else does it, but I go back and forth 
between piano and spreadsheet until I get something that works 
on paper, will physically fit in the piano, and is in my 
judgment most likely to work tonally.

Ron N