SAT III beating octaves.

[Kevin E. Ramsey]

    David, if you pluck the string as opposed to hitting it with the hammer,
you are not exciting a different harmonic, you are just exciting the string
at a different place than the hammer would, and giving yourself a little
better shot at seeing the eighth partial. As far as getting a different
reading from it, I haven't seen a significant difference in readings, but if
you're worried about it, you can pluck the string for both readings.


----- Original Message -----
From: "David Ilvedson" <ilvey@jps.net>
To: <pianotech@ptg.org>
Sent: Tuesday, January 30, 2001 10:30 PM
Subject: Re: SAT III beating octaves.


> Jim,
>
> If I pluck the F3 string instead of using the key I am exciting a
> different harmonic but I often can get a better reading.  How will this
> affect the FAC?
>
> David I.
>
>
> > Here is a method to gain better accuracy: Instead of tuning the F3 to
> > the setting F5=0.0 (it is difficult to tune to the accuracy of .1
> > cent), if the F3 is fairly close, adjust the cents to really stop the
> > dot rotation. Then hold down the SHIFT button and touch the MSR button
> > to reset the SAT to that pitch. Now, you can press UP OCTAVE, use the
> > MSR button to slow or stop the dots  while playing the F3 (trim up
> > using the cents buttons if necessary for absolute precision). Store
> > this number (which represents the difference in cents between the 4th
> > and 8th partials of F3) in the usual fashion by holding down the SHIFT
> > button and pressing the STO STRETCH button. Utilize the same procedure
> > for measuring the A4 Stretch number more accurately, and the same for
> > the C6 number. Remember that just before calculating the tuning, you
> > must recalibrate the SAT to a true A-440 by holding down the SHIFT and
> > TUNE buttons to get into the Calibrate mode and then press TUNE to get
> > out. Select a page of memory by using the dedicated PAGE Up or Page Dn
> > buttons. Now you can do the "rollover technique" (hold down STRETCH,
> > hold down MEM, release STRETCH, release MEM). Wait 4 or 5 seconds and
> > you have a good tuning for the complete piano. If your personal taste
> > dictates more or less octave stretch, then you can use the DOB as
> > described above. The DOB can be invoked at any point where you would
> > like the tuning to be a little different.
> >
> > Shakespeare wrote a play "As You Like It". Dr. Sanderson wrote a
> > tuning program "As You Like It." I love it. The SAT III does what I
> > want it to do.
> >
> > Jim Coleman, Sr.
> >
>
>
> David Ilvedson, RPT
>