Peterson AutoStrobe 490ST - Manual (Page 26)

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display to the next note in the sequence. At any time short of defining all 96 notes, we may exit and permanently save the
file by hitting button “3” (DONE) and then the ENTER button. This will save our stretch file with all the note offsets we
had entered to that point. Any notes that we declined to define in an editing session will be saved with the initial zero values
(or previously defined offset values if we were editing a pre-existing file). Thus, if we were creating a stretch for a bass
guitar, we would only need to define a handful of notes and not have to drone our way through 92 (96 minus 4) zero offset
definitions. Similarly, had we been merely editing a pre-existing stretch file, we may have wished to only “tweak” several
values and not redefine the whole file.
Once a stretch is activated, its name will appear at the upper right-hand corner of the RUN screen:
KEY= C STRCH= STGD
A=440 C 00 ¢
AUTO OCT=x
SETUP MODE OCT- OCT+
1 2 3 4
Whenever a stretch file is active under the RUN screen, an indication of the current octave (OCT) of scale note settings that
the unit is referencing from that stretch file is displayed on the third line of the LCD display. The current octave is
never automatically sensed but is chosen at the discretion of the user by pressing buttons "3" or "4" beneath the display.
Specifically, button "3" (OCT-) will decrement the octave setting (octave 7 through octave 0). If held continuously, it
will continue to decrement the setting shown on screen line 3, wrapping back around from OCT=0 to OCT=7. Conversely,
button "4" will increment the octave setting, eventually wrapping from OCT=7 to OCT=0. The functions of buttons "3" and
"4" are paralleled on the "tip" and "ring" connections, respectively, of the "OCT- / OCT+" stereo 1/4-inch jack at the back
of the Model 490-ST. This allows "hands-free" setting of the currently selected octave through a momentary-close dual
footswitch when a stretch file is active. (A proper footswitch is available from peterson as part #: 140069.)
In addition, a simple, multi-purpose mono footswitch jack (farthest from the center of the rear panel) performs an Octave
increment-only function while a stretch file is active and AUTO note select mode is active. (A proper momentary-close
footswitch is available from peterson as part #: 140070.) When in MANual note-selection mode (as determined by
Function button "2"), this mono jack performs a note-increment function to allow convenient hands-free manual note
selection during a tuning session.
NOTE: The cent offset which appears on the second line of this screen still refers to the global cent offset for the tuner—not
the individual note offsets applied by the current stretch file for the current note. This global offset number is a common
offset to all notes in addition to the individual note offsets applied by the stretch table. The individual note offsets within
a stretch file are only readable under the EDIT section of the STRETCH MENU.
4. TUNING INSTRUMENTS THAT PLAY IN OTHER THAN THE KEY OF “C”
The Model 490-ST solves one of the biggest difficulties for wind players and other non-“C” instrument musicians when
using a precision tuner. Mental transposition of your note into the key of “C” is no longer required. The tuner can be easily
shifted to show the correctly transposed note names for tones played on C, B=, F, and E= instruments.
When the Model 490-ST is displaying the normal RUN screen, simply press the button labeled “KEY”. Multiple presses
of this button will cycle the tuner through the musical instrument tuning keys of C, B=, F, and E=. You may press the KEY
button as many times as you wish and the tuner will sequence through the keys of C, B=, F, E=, C, etc. The pitch referenced
by the tuner will change as the speed of the strobe disc is internally transposed for the new tuning key. (Note that any button,
such as KEY, which causes a change in strobe disc speed will be temporarily disabled while the motor is accelerating to its
destination speed.) When in Auto-Note mode, sound your note and the scale note displayed on the LCD screen will reflect
the transposition from “concert pitch” that corresponds with the currently selected KEY parameter shown in upper left hand