tune F4. Then set the SAT to F6 and play the note F4, use the cents buttons to stop the lights on the SAT. Next hold
SHIFT button down, and press STO-STRETCH button, release STO-STRETCH, then release the SHIFT button. Next
press the STRETCH button once more to get the SAT calculating the C3 through F6 stretch tuning. Now the SAT will be
set up at C3 and ready to tune.
TUNING THE HIGH TREBLE WITHOUT FAC
Tuning the high treble without FAC is relatively easy. The best tuning for each note can be determined by referencing
one, two or three already-tuned notes. These notes lie one octave, an octave-fifth, and two octaves lower than the note
you are tuning.
1. Set the SAT to the NOTE and OCTAVE of the note being tuned.
2. Play the reference notes one at a time and see how they look on the rotating lights.
3. Step the CENTS up or down until you find a setting that is a reasonably good compromise. In other words a
setting where some of the reference notes rotate slowly sharp and some rotate slowly flat.
4. Then tune the note.
Tuning is more of a problem in the last octave because a good compromise is difficult to find. Decide which interval will
take priority and tune mainly to satisfy that partial.
At this point many tuners stick to the single octave, but tune one or two cents wide. Others prefer to tune the double
octave which gives a considerably sharper top end, or the octave-fifth, which is even sharper. The choice is up to you and
your customer.
TUNING THE BASS WITHOUT FAC
Tuning the bass is similar in principle to tuning the high treble. Set the SAT with reference to several previously tuned
notes and compromise among them to place the note being tuned.
The best reference notes lie an octave, an octave-fifth, and a double octave-fifth higher than the note being tuned. To use
these reference notes, set the SAT a double-octave-fifth higher than the note being tuned (on its sixth partial).
1. Play each reference note one at a time.
2. Step up or down with the CENTS buttons until a good compromise setting is found, one where some reference
notes are rotating slightly flat, others slightly sharp.
3. Tune the note.
4. Continue this procedure all the way down to A0.
In contrast to the situation in the high treble where the three tests diverge, the three bass tests usually work nicely all the
way to the last note.
PATENT NOTICE
The method of tuning a piano by measuring its inharmonicity and then creating a numerical tuning customized to fit that
piano are the subject of Patent No’s 3,968,719, 3,982,184, 4,014,242, 5,285,711 issued to Dr. Albert E. Sanderson of
Inventronics, Inc., and other patents pending.
INPUT-OUTPUT JACKS
There are six input-output jacks on the back of the SAT that increase the versatility of the SAT for various special
purposes. The jacks on the back of the SAT II are shown below.
