strip muting: pitch question

[Jim Coleman, Sr.]

Hi Wim:

The new SAT III has two amounts of overshoot to be used in pitch 
raising. In the previous models, tuning the unisons as you go would give
more accurate results except that the Bass would end up high. If one used
a strip and tuned only the center strings with the machine and later came
back to clear the unisons, the treble would end up flat.

Now, one can use the 25% over-ride for the Bass doing only the open strings
with the felt strip in position, use the 34% over-ride for the treble with
the strip installed. After clearing the unisons, the pitch is very close to
where you want it for a fine tuning to follow.

There is now a second SHIFT button. After measuring the flatness of a 
section, one can hold down the MSR button, hold down the regular SHIFT
button, release the MSR button, then release the SHIFT button (this is 
called a roll-over technique). This will give a standard 25% over-ride.
If one rolls-over to the SHIFT2 button, there will be a 34% over-ride.

Using the temperament strip is faster than tuning unisons as you go. My
record time for a pitch raise was done before an audience several years
ago in just over 9 minutes, using the strip. Doing it by clearing unisons
along the way usually takes from 15 to 20 minutes.

I still like to tune the Bass last. It avoids the confusion of trying to
figure out which partial the machine is listening to on note A0. I always
tune downward in the Bass.

Jim Coleman, Sr

On Thu, 20 Aug 1998 Wimblees@aol.com wrote:

> In a message dated 98-08-19 07:58:45 EDT, you write:
> 
> << 
>  I looked at the archives (strip muting) but don't see an answer to this
>  question:
>  
>  Is the center string of a trichord in a piano's midsection less likely to
>  shift in pitch than the outer strings during a tuning?
>  
>  This has been my impression over the years.  I thought about it recently
>  when I had the opportunity to do an RCT tuning for the first time and was
>  following the suggestions of the owner of the RCT, to "start with A1 and use
>  only one rubber mute" (which I did).
>  
>  Can't make much of a judgement based on one tuning, but I missed the T-strip
>  a lot.  'Course,  I missed my blankie, too,  when they took that away from
>  me.
>  
>  Rob Stuart-Vail
>   >>
> 
> 
> Rob:
> 
> It is my impression that none of the strings shift in pitch. I am of the
> belief that it is the increase preasure on the bridge that causes pitches to
> change during a tuning, unless, of course, the pin wasn't set properly, or the
> string wasn't stabalized. 
> 
> The contention seems to be that starting on A0 is putting preasure on the
> bridge in a different way than starting in the middle and going up or down. I
> have done tunings three ways. Strip mute, and tune from the middlle down and
> then up (aurally). Strip mute and start at A0,  and started at A0 with a
> rubber mute. My conclusion is that there is no difference in the outcome. 
> 
> Willem Blees RPT
> St. Louis
>