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the STRETCH button again for the C6 stretch number. The stretch numbers will continue to cycle
through F3, A4, and C6 to review them again.
NOTE: Some tuners have reported that the FAC numbers tend to get better, that is, drift lower as
a piano is tuned repeatedly.
The FAC numbers are automatically inserted into the header that is part of the tuning record of
each piano. The header below is an example, which shows page 1, has the FAC numbers of 10.2
for F3, 8.8 for A4, and 7.9 for C6:
001_______________________________________________________10.2 8.8 7.9 FAC
V iew i n g FA C N u m be r s f r o m a Page i n Memo ry
To view or copy the three stretch numbers from an existing FAC tuning in memory, use the
following procedure:
1)
Turn on the Accu-Tuner.
2)
Press the TUNE button.
3)
Use the PAGE buttons to get to the desired page in memory to view/copy the stretch
numbers.
4)
Hold down the SHIFT 2 button.
5)
Press the STRETCH button.
6)
The three (F3, A4, or C6) stretch numbers will be loaded into the FAC stretch number
memory.
7)
Release the SHIFT 2 button.
8)
Hold down the STRETCH button (to view the first stretch number).
9)
Release and press down the STRETCH button a second time (to view the second stretch
number).
10) Release and press down the STRETCH button a third time (to view the third stretch number).
C o py an d Pa ste an E n t i re Pa ge of Memo ry
Go to the page of memory that you would like to make an exact copy of, lets say page 17, once
on page 17 hold down the GREEN SHIFT and press the COPY button (MEM in black). The display
will show COPY THIS PAGE, use the PAGE button to go to the desired page for making a copy,
then hold down the GREEN SHIFT and press the PASTE button (TUNE in black). The display will
show PUT COPY HERE; at this point the Accu-Tuner IV has made an exact copy of the selected
tuning to the paste page.
O ff setti n g a n FA C T u n i n g t o N o n - S tan da r d P it c h
Tuning and pitch-raising a piano to non-standard pitch is very easy with the FAC program.
Prepare the Accu-Tuner with the RESET feature to get the Accu-Tuner offset to the required pitch.
For instance, to tune at 442 put 7.9 cents into the CENTS location, hold down SHIFT and press
RST. (Add approximately four cents for every Hz above 440 Hz, or subtract for every Hz below
440 Hz for the tuning, table and formula below.) The cents display is reset to zero, and the 7.9
cents is stored as a pitch offset. The plus sign will appear just to the left of the note and octave,
which indicates the pitch is offset on the sharp side. Any pitch offset up to a semitone sharp or
flat can be store this way.
