FAC numbers

[Joe & Penny Goss]

That is why I do it my way. It takes longer to reach for the measure button
each note than just use another program that the numbers fit. Again IF
anyone knows what is the theory behind the F4 number stretch?
Joe




> Hi Jim:
> 
> Since the F4 stretch number gives you a tuning only from C3 to F6, you
> have to tune the notes F#6 and above based either on partials of the 
> already tuned F#5 or F#4 (ie attached to the main body of notes already
> tuned). This procedure is followed all the way up to note C8. After
tuning
> in the Stretch mode from C3 to F6, touch the TUNE button to go beyond the
> F6 to F#6. Play F#4, adjust the cents buttons to stop the LEDs which may
> be rotating slightly. The machine is reading the 4th partial of F#4. Then
> when you tune F#6 to this setting, you will have a perfect double octave.
> This will be a slightly sharper tuning than you would get if you played
> the F#5 note and stopped the LEDs to match the F#6 to the 2md partial of 
> F#5. I personally prefer the matched double octave rather than the
matched
> single octave. After you have tuned F#6, advance the machine to G6, play
> the G4, stop the LEDs, tune the G6 to that setting. Continue in like
fashion
> to the C8.
> 
> To pigtail the upper Bass to the Stretch tuning below C3. After
descending 
> to the bottom of the Stretch mode at C3, to go below C3, you need to 
> touch the TUNE button. This will show that the SAT I was really listening

> to C5 when you tuned the C3. Now you can hit the NOTE Down button to 
> drop to B4 which was already tuned in STretch mode. With the Cents
buttons,
> stop the LEDs rotation. Now you can tune the B2 2nd partial to this
setting.
> It will give you a perfect double octave with B4. This is what we call 
> 4-1 octave matching. I prefer to tune the Bass of most pianos using the
6-3
> octave matching where the 6th partial of B2 (at F#5) will be tuned to the
> 3rd partial of B3 (F#5). Here's how to do it. Play the B3 note with the
> SAT set to F#5 in the TUNE mode. Stop the LEDs with the CENTS UP/DN
buttons.
> Then tune B2 to that setting. This will give you a B2-B3 octave where the
> standard minor 3rd-Maj 6th tests will be equal (ie B2-D3 beats the same
as
> D3-B3).
> 
> For those who still use the older Sight O Tuner (SOT for short) the same
> principles apply. The upper treble is pigtailed onto the previously tuned
> Stretch tuning derived from the Stretch Calculator card. To tune the F#6,
> play the already tuned F#4, stop LED rotation using the Fine or Coarse
> knobs, then tune F#6 to that setting. continue in like manner all the way
> to the C8.
> 
> Similarly in tuning below the C3, set the note/oct switches to F#5 
> (which is the 3rd partial of the already tuned B3), stop the LEDs with
the
> Fine and/or Coarse Cents knobs, Tune the B2 to stop the LEDs. Change the
> note selector to the next half step lower (F5), play A#3, stop LEDs, tune
> A#2 to stop dots. continue like this all the way down to A0.
> 
> This may be more than you asked for, but it may help others who needed
> a little more detail.
> 
> Jim Coleman, Sr.
> 
> 
> On Mon, 24 Aug 1998 Jlovekeys@aol.com wrote:
> 
> > 
> > "For a few strange pianos the F4 stretch number works better, but then
you
> > have to pigtail on the treble and Bass".  Please explain the term
"pigtail" on
> > the treble and bass?  thanks. Jim Love, PTG associate, Midland,Tx. 
> >