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button then release MEASURE, then release SHIFT. The Accu-Tuner will automatically offset
itself by one-quarter of the measured flatness. (A note forty cents flat will automatically calculate
an offset value of 10 cents sharp). Tune with the calculated offset for six to twelve notes, and
then repeat the measurement on the next untuned note to get a new pitch-raise correction. The
correction changes quite slowly on a normal piano, and needs to be recalculated six to ten times
to cover the entire keyboard. A good place to recalculate the overpull is at the breaks in the
piano scale or breaks in the plate.
The pitch correction factor of one-quarter is designed to work best with the "unisons-as-you-go"
method of pitch raising. You can modify the number given by the Accu-Tuner. If the Accu-Tuner
calculates 10 cents, but you feel 8 cents would be better, just enter -2 cents and store this offset
(hold SHIFT and press RST button). The net offset will be 8 cents. Usually it is not worth the time
to try to outguess the pitch-raise calculator. The Accu-Tuner IV can also calculate a pitch
correction factor of your choice.
Let's start at A0, select the correct page, press NOTE up and NOTE down. To use the pitch raise
calculator for twenty-five percent overshoot:
1)
Hold down the MEASURE button while striking the note (A0 in our present scenario) until the
LEDs stop or nearly stop.
2)
Hold down the SHIFT button.
3)
Release the MEASURE button.
4)
Release SHIFT button.
To use the pitch raise calculator for your stored correction amount on the page 123 in memory:
1)
Hold down the MEASURE button while striking the note (A0 in our present scenario) until the
LEDs stop or nearly stop.
2)
Hold down the SHIFT 2 button.
3)
Release the MEASURE button.
4)
Release SHIFT 2 button.
The Accu-Tuner automatically offsets itself by stored overshoot amount for that particular note on
page 123 in memory. (For Example if 33 were stored for an overshoot amount, a note forty-five
cents below pitch will automatically result in an offset value of fifteen cents sharp). Tune with the
calculated offset for half an octave or so, then repeat the measurement on the next untuned note
for a new pitch-raise correction.
In general, 25% is adequate for wound strings. The first plain wires require 33% then 25% for
unisons as you go. When pitch raising with the unisons last method, use 33% for all the plain
wires.
Pitch lowering is just the reverse of pitch raising (to a piano), and the program works just as well
for lowering pitch as for raising it. Just follow the above procedure; no changes have to be
made.
When finished with the pitch raise, cancel the overshoot with the following: hold down the SHIFT
button and press the CAL button. Keep the CAL button held down until the display jumps to A 4,
0.0 cents with two to four LED’s lit. When the TUNE button is pressed to leave the CAL mode, the
page of memory is still selected. Use the NOTE and OCTAVE buttons to get to the desired note
and start tuning. Once the pitch raise is complete, hold SHIFT and press the CAL button until the
calibrate signal is displayed, then press the TUNE button. Going to the calibration mode will
cancel the overshoot so you can tune the piano at the desired pitch.
CUSTOM PITCH RAISE
