[pianotech] "cracking" the unisons

[David Nereson]

Oh, OK -- so, one isn't really "cracking" a unison, but rather, 
refining the temperament.
    --David Nereson, RPT


----- Original Message ----- 
From: "Ryan Sowers" <tunerryan at gmail.com>
To: <pianotech at ptg.org>
Sent: Wednesday, April 13, 2011 9:49 AM
Subject: Re: [pianotech] "cracking" the unisons


> Cracking (or shimming) the unisons is a way to move an entire 
> unison up or
> down a very slight amount for fine tuning. Lets say you have a 
> 3rd that you
> want to be just a tiny bit faster or slower. You mute out one 
> string of the
> unison and leave two open. You move one open string so that 
> the two strings
> have the slightest whine or out of phase sound and then bring 
> the other one
> up or down to match it. Then bring in the third string.
>
> On Tue, Apr 12, 2011 at 11:46 PM, David Nereson 
> <da88ve at gmail.com> wrote:
>
>> Re: Ben Gac's article in the most recent Journal:  What 
>> actually cracks
>> when one "cracks the unisons"?  I know, I know -- it's an 
>> expression -- but
>> what in the actual procedure gave rise to the use of this 
>> phrase?  I still
>> don't see how it differs from tuning beatless unisons.
>>   --David Nereson, RPT
>>
>
>
>
> -- 
> Ryan Sowers, RPT
> Puget Sound Chapter
> Olympia, WA
> www.pianova.net
>