Peterson 5000-II User Manual

peterson

Strobe Center™ 5000 II

Strobe Tuner

Instruction Manual

Revised 4-00 for Software Revision 1.05

© 1996, 2000 Peterson Electro-Musical Products, Inc.

11601 S. Mayfield Avenue, Alsip IL 60803-2476
Phone: [phone] FAX: [phone]

[e-mail]

http://www.PetersonTuners.com

TABLE OF CONTENTS

INTRODUCTION ........................................................................... Page 1

EASY TO USE GUIDE FOR BASIC EQUAL TEMPERAMENT TUNING ............................. Page 1

SUMMARY OF FEATURES AND FRONT PANEL CONTROLS .................................... Page 2

STEP-BY-STEP INSTRUCTIONS FOR USING THE Strobe Center 5000 ............................... Page 4

1. EQUAL TEMPERAMENT TUNING ..................................................... Page 4

2. ENHANCING THE VISIBILITY OF THE STROBE PATTERNS .............................. Page 4

3. TUNING TO A PITCH STANDARD OTHER THAN A=440 .................................. Page 7

4. TUNING INSTRUMENTS THAT PLAY IN OTHER THAN THE KEY OF “C” .................. Page 8

5. CUSTOMIZING THE START-UP MEMORY SETTINGS .................................... Page 8

6. CHECKING INTONATION WITH THE SC-5000 .......................................... Page 9

7. ENHANCED RESOLUTION OF INTONATION MEASUREMENTS ........................... Page 10

8. ON-STAGE TUNING USING THE SC-5000 DURING A PERFORMANCE .................... Page 11

9. TUNING FOR NON-EQUAL TEMPERAMENTS .......................................... Page 11

10. SETTING AND USING CUSTOM NON-EQUAL TEMPERAMENTS ......................... Page 15

11. COPYING AND MODIFYING (OR DELETING) AN EXISTING TEMPERAMENT FILE ......... Page 19

12. STRETCH SCALE TUNINGS FOR PIANOS AND SLIGHTLY INHARMONIC INSTRUMENTS . . . Page 22

13. CREATING CUSTOM STRETCH TUNINGS ............................................. Page 26

14. COPYING AND MODIFYING (OR DELETING) AN EXISTING STRETCH FILE ............... Page 32

APPENDIX A: TEMPERAMENT FILL-IN FORM................................................ Page 36

APPENDIX B: STRETCH FILL-IN FORM ...................................................... Page 37

APPENDIX C: STRETCH FILE DATA AND CHARTS ............................................ Page 38

INDEX ................................................................................... Page 46

INTRODUCTION

peterson

The
microprocessor digital and motor control technologies have been combined with the 12 individual strobe-wheel tuning
method to provide a versatile tuner with unsurpassed accuracy and features. The SC-5000 II is designed to be easier to read
and even simpler in operation than its predecessor, the SC-5000. It is designed to be used by music educators, musicians,
manufacturers, and for any tuning application where an accurate and versatile tuner is required. Musical instrument
maintenance professionals will appreciate the easy, intuitive procedures included for "stretch" tuning and simple methods
of storage and recall of any desired stretch or unequal temperament tuning ratio.

Strobe Center™ 5000 II is the most advanced tuning device ever developed. Precision

PREPARATION FOR USE

IMPORTANT PRECAUTION: The Model SC-5000 is designed to be used on either 100-130 or 200-260 Volt, 50/60 Hertz
AC power sources. IT IS VERY IMPORTANT FOR THE VOLTAGE SELECTOR SWITCH LOCATED ON THE BACK

OF THE TUNER TO BE SET FOR THE PROPER VOLTAGE BEFORE PLUGGING IN THE LINE CORD...........

FAILURE TO DO SO MAY RESULT IN SEVERE DAMAGE TO THE INSTRUMENT!

Check the setting of the voltage selector switch located on the back of the tuner. If it must be changed, use a small blade
screwdriver and rotate it so the white dot above "110" or "220" (depending upon which voltage you require) lines up with
the pointer. You may now plug the tuner line cord into the power outlet.

EASY TO USE GUIDE FOR BASIC EQUAL TEMPERAMENT TUNING

We will first give a summary of how to use the SC-5000 for basic tuning using the equal-tempered scale and A=440 Hz as
the pitch reference. We follow later in the instructions with the details of how to use the other features available on the tuner.

After you have checked the back of the Strobe Center 5000 as detailed above to verify that the voltage selector switch is set
to the correct position of 110 Volts AC or 220 Volts AC, connect the line cord to the AC outlet receptacle and follow these
easy steps to use the tuner.

Press the power switch located on the back panel of the tuner to ON (up position). The SC-5000 will take approximately
5 seconds to perform a self-check during the power-up cycle. During this self-diagnostic interval, the display panel will
indicate:

PETERSON

MODEL SC 5000 TUNER

REV # XXXX

SERIAL # XXXXXXXXXXX

At the conclusion of the power-up tests, all twelve tuning wheels will begin rotating and will flicker slightly due to random
noise in the room. The display panel will then
change to the normal Run Mode indication as
shown below:

KEY = C
A = 440 00 ¢
HI
SETUP IMAG

The initial screen during the power up phase is depicted here.
Line three shows the software revision number and line four the
serial number of the particular tuner.

The first line indicates that the tuner is set for instruments that
operate in the Key of C. Line two indicates that the standard for
Concert A is currently set to 440 Hz (Hertz) and that the global
pitch offset is set at “0" cents deviation. Line three shows the
current Image Clarifier setting. The items on line four always
indicate the current function of the menu-driven Function buttons
(1 through 4) below the LCD display and will be explained later in
the text.

Page 1

The built-in microphone will pick up an instrument from across a relatively quiet room. However, if you are working in a
noisy environment it may be helpful to use an external microphone to be more selective and point the microphone directly
at the instrument you wish to tune. At this point you simply play the note you wish to tune.

Each of the 12 tuning wheels is marked with a note corresponding to the chromatic scale. The tuning wheel that matches the
note sounded will glow brightly, and a dark pattern will appear on the wheel. When this pattern appears to be stationary,
the note is perfectly in tune with the equal-tempered scale derived from middle A at 440 Hertz (cycles per second). When
the pattern appears to rotate to the right, the note being played is sharp. Conversely, if the note is flat the pattern will appear
to rotate to the left. The faster the pattern appears to be moving, the farther out of tune the note is. Observe that the pattern
will appear to move more slowly as your instrument is brought more closely into tune, and that it will appear to stop moving
when the sounded note is exactly in tune.

SUMMARY OF FEATURES AND FRONT PANEL CONTROLS

We'll begin with a brief description of the basic features plus the front panel controls and indicators of the
Strobe Center 5000. This will provide you with a quick reference guide to the front panel of the tuner. Detailed information
about each control is explained later in the section titled “Step-by-Step Instructions”.

FRONT PANEL

1. IMPROVED ACCURACY AND STABILITY WITH QUIET OPERATION, 12 SEPARATE MOTORS - An
internal quartz crystal reference provides absolute stability to the tuning accuracy. No warm up period is required unless
the tuner has been subjected to extreme temperatures, either hot or cold. In this instance allow the tuner to sit at room
temperature for about ten minutes before starting. The tuner is accurate to within 1/10 of 1 cent throughout the entire
range of the instrument. Each of the twelve strobe tuning discs is driven by an individual, electronically-controlled
motor. All twelve motor controllers receive their commands from the microprocessor or "brains" of the tuning center.
Gear box noises previously experienced with 12-wheel tuners are entirely eliminated. Separate motors also allow the
versatility of both multiple temperaments and stretch tuning with the Strobe Center 5000.

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2. PITCH UP / PITCH DOWN arrows - Precision digital Vernier Control permits you to sharpen or flatten the pitch of
the SC-5000 to measure the correctness of your own intonation with an accuracy of 1/1000 of a semitone. You can
adjust the tuner sharp or flat over a range of one half semitone (50 cents) each way, with selectable resolution of 1/10,
1/2 or 1 cent increments (1 cent equals 1/100 semitone). If you use this feature to stop a strobe pattern, after the tuner
wheel is stationary, the display indicates how many cents sharp or flat the tuner has been adjusted, giving you an exact
reading of the difference from correct intonation for each note observed. (These buttons are also used as select buttons
under some of the Temperament and Stretch Menu screens.)

3. EIGHTY-CHARACTER LCD MENU SCREEN - Simplicity and ease of operation are enhanced by the intuitive and
user-friendly menu screen displays which address all the functional features of the tuner.

4. FOUR MENU-DRIVEN FUNCTION KEY BUTTONS - These four keys are each defined by the specific menu­screen information for each of the various operational modes of the tuner. They permit great flexibility and simple user
interaction with the Strobe Center 5000.

5. ENTER - This push button is used to select specific values of Pitch Up or Pitch Down deviations when editing
customized temperament and/or stretch tuning files used in specialized tuning applications. It is also used for some of
the user selections in the programming menu of the tuner.

6. MUTE - The Strobe Center 5000 may be used on-stage during a performance with the external Input patched through
to the Output. The Mute Mode disconnects the internal patch through path to permit silent on-stage tuning. The Mute
is a toggle function. Press the key once to engage the Mute Mode ("M" will be indicated on the display panel when this
feature is activated). Press the key again to restore normal patch through operation.

7. SELF-CONTAINED MICROPHONE & EXTERNAL PATCH THROUGH INPUT- The Strobe Center 5000 is
equipped with a built-in condenser microphone as a complete self-contained tuning center. The intonation of notes
sounded into this microphone will immediately be visible on the corresponding tuning disc. The front panel also includes
connectors for an external Input and patch through to Output. The internal microphone is automatically disconnected
whenever the external Input is used for an outboard microphone or other electrical input.

8. DISPLAY +2 / -1 - Improved pattern clarity is achieved for the hard to see lower and upper octaves by pressing this
key once or twice. The +2 Mode lifts the bass notes up by two octaves into the middle of the strobe discs for easier
readability. Similarly, the -1 Mode drops the treble notes down one octave on the strobe wheels. Combining this feature
with both Advanced Image Clarifier filtering and automated contrast adjustment makes the Strobe Center 5000 very easy
to use.

9. KEY - Selectable key signature is used to change the Strobe Center 5000 to the key in which your instrument is tuned.
You no longer have to transpose your note to the key of C. Press this button once, twice, or three times to adjust the tuner

between the keys of C, B=, F, and E=. Sound your note and the tuner will show your intonation on the tuning disc

corresponding to the note you are playing.

10. USER SELECTABLE PITCH - The International Standard Pitch of A=440 Hertz (cycles per second) can be raised
or lowered to any tuning frequency you desire. The adjustment range for Middle A (A4) is from A=350 Hz to
A=550 Hz. This modified standard pitch can be memorized in the Strobe Center 5000 so that the tuner starts up
calibrated for the selected pitch of your preference. The pitch currently selected for "A" is displayed by the LCD
indicator screen.

11. SELECTABLE TEMPERAMENTS - The microprocessor circuitry allows you to choose the equal tempered scale
or one from a list of seven preprogrammed non-equally tempered tunings. You may program and save personal custom
temperaments by entering the tempered values for each of the twelve notes in the chromatic scale in 1/10 of 1 cent
increments. The current temperament in use is shown in the LCD display panel whenever it is different from the equal
tempered scale.

12. STRETCH TUNING FROM STANDARD OR CUSTOM TABLES - The Strobe Center 5000 has 8 built-in stretch

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tables for tuning pianos or other slightly inharmonic instruments. You may also enter your own preferred stretch
configuration. You may then save this information into memory. The chosen stretch configuration in use is displayed
on the LCD display screen whenever Stretch Mode is engaged.

STEP-BY-STEP INSTRUCTIONS FOR USING THE Strobe Center 5000

1. EQUAL TEMPERAMENT TUNING

a. Check the back of the Strobe Center 5000 to verify that the AC Input Switch is set to the correct position of 110

Volts AC or 220 Volts AC. Connect the line cord to the AC input receptacle.

b. After confirming the setting of the AC Input Switch and attaching the Line Cord to your AC power source, move

the power switch located on the back of the tuner to the ON (up) position. The Strobe Center 5000 will take
approximately 5 seconds to perform a self-check during the power-up cycle. During this self-diagnostic interval,
the display panel will indicate:

PETERSON

MODEL SC 5000 TUNER

REV #XXXX

SERIAL #XXXXXXXXXX

c. At the conclusion of the power-up tests, all twelve tuning wheels will begin rotating and will flicker slightly in

response to random sounds in the room. The display panel will change to the normal Run Mode screen:

KEY=C
A=440 00 ¢
HI
SETUP IMAG

When the power is first turned on, the Strobe Center 5000 defaults to the equally tempered chromatic scale based on middle
A at 440 Hertz (cycles per second). Each of the 12 wheels is computer controlled to indicate whether a note played into the
microphone is sharp or flat from the correct pitch by means of dark markings which create a pattern which appears to move
either in a clockwise or counterclockwise direction. Counterclockwise movement of the pattern indicates that the note is
flat, while clockwise movement indicates that the note is sharp. The pattern appears to moves more slowly as the note is
brought closer into tune and it appears to be stationary when the note is in tune.

d. Use the built-in microphone on the front of the Strobe Center 5000, or you may connect an external microphone or

other direct input to the external Input connector on the front panel. The internal microphone is disconnected
whenever the external Input is used.

e. Each of the 12 tuning wheels is identified with its corresponding note in the chromatic scale. In a relatively quiet

room, play the note to be tuned, and it will be picked up by the internal microphone. When using an external
microphone, it may be placed as close as a few inches from the musical instrument in order to pick up the maximum
volume of the tone being produced.

2. ENHANCING THE VISIBILITY OF THE STROBE PATTERNS

At times when playing in the lower or upper musical registers, you may want to make the strobe patterns more distinct. The
Strobe Center 5000 is equipped with an adjustment to enhance the visibility of the strobe patterns. The Image Clarifier is

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always active and is set to either Low or High, corresponding to the lower or upper musical registers. Although the
SC-5000 II contains imaging improvements which yield good results even for low frequency sounds when in the factory­default “HI” setting, the strobe patterns for very low notes can be further clarified by changing to the “LOW” setting. This
is now a one button function.

a. ADJUSTING THE IMAGE CLARIFIER

KEY=C
A=440 00 ¢
HI
SETUP IMAG

Key #1 calls up the Setup Menu.
Key #2 toggles the current Image Clarifier setting shown
on the third line of the LCD screen.

1 2 3 4

Pressing Key #2 “IMAG” will toggle the current clarifier setting which is always shown on the third line of the LCD
screen immediately above the “IMAG” label on the RUN screen:

KEY=C
A=440 00 ¢
LOW
SETUP IMAG

Function Key #2 will toggle the Image Clarifier setting.

1 2 3 4

The tuner will continue to operate normally while you are making adjustments to these image enhancements thus
enabling you to view the effect of the changes you are making. Pressing Key #2 again will toggle the current IMAG
status back to “HI” once again. This can be repeated indefinitely. NOTE: The adjustments you make from this screen

will only stay in this particular setting while you are using the tuner until you turn off the tuner’s power switch. To
change the Image Clarifier default setting (the way it will be set on power-up), use the following method.

b. SETTING THE DEFAULT (POWER-UP) ADJUSTMENTS OF THE IMAGE CLARIFIER

KEY = C
A = 440 00 ¢
HI
SETUP IMAG

Key #1 calls up the Setup Menu.
Key #2 toggles the current Image Clarifier setting shown on
the third line of the LCD screen.

1 2 3 4

i. From the Run Mode screen press Key #1 to bring up the Setup Menu.

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SETUP MENU
PLEASE SELECT MODE

OPTN FILE RUN DIAG

Key #1 will call up additional option menus.
Key #2 will bring you to the temperament and stretch file
choice menu.
Key #3 will return the tuner to the Run Mode
Key #4 will call up factory diagnostics.

1 2 3 4

ii. Press the #1 key which is labeled OPTN (meaning Options) and you will first see a screen for recalibrating the

tuner to a different pitch standard. From this new screen press the #1 key again (labeled NEXT) to bring up
the menu for adjusting the Image Clarifier:

SET IMAGE CLARIFIER
LOW / HI? (NOW - XXX )

NEXT RUN LOW HI

Key #1 brings up the next choice of Image setting.
Key #2 returns tuner to Run Mode.
Key #3 when pressed will set Image Clarifier to Low.
Key #4 when pressed will set Image Clarifier to High.
The present setting is shown in (NOW - XXX).

1 2 3 4

Press the #3 function key to set the Image Clarifier to Low or key #4 to set it to High. After you have chosen the
desired Low or High register, your choice will show in the "NOW - XXX" portion of the window. The tuner again
continues to operate in the normal Run Mode when you are setting the Image Clarifier so that you may observe the
difference in the clarity of the pattern while you make these adjustments. Pressing the #1 key will advance to the next
screen which allows you to store the last selected Concert A, Image Clarifier, +2/-1 Display,and Key settings into the
power-up memory:

STORE VALUES IN
MEMORY?

NO YES RUN

Key #1 returns to SETUP menu without storing defaults.
Key #2 stores new defaults and returns to SETUP menu.
Key #3 returns to Run screen without storing defaults.

1 2 3 4

c. USING DISPLAY +2 / -1 FOR ENHANCED VISIBILITY

The Display +2 Mode is used when tuning extremely low bass notes. Press the Display button once and all strobe
patterns are shifted up exactly two octave bands on the strobe disc. With the tuner in the Display +2 Mode, all
twelve tuning discs are now slowed down exactly two octaves, so that the strobe patterns on the tuning wheels are
correspondingly shifted upward exactly two bands on each wheel into the easier to read middle bands or registers
on the strobe discs.

Similarly for extremely high treble notes, Display -1 mode shifts all strobe patterns down exactly one octave. The

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rotational speed of each strobe disc is doubled beyond the normal tuning speed. The dark tuning indications are
then shifted downward by one octave into the middle region of the tuning wheels. When in the Display +2 mode,
press the Display key one more time and the tuner wheels are shifted to the -1 mode.

Press the Display key one more time to return the Strobe Center 5000 back to the normal speed tuning mode. The
Display modes will follow this sequence as the Display button is pressed repeatedly: Normal display mode, Display
+2 mode, Display -1 mode, Normal display mode, etc. When in Display +2 or Display -1 modes, the indicator
panel will show the Display status:

KEY = C
A = 440 00 ¢
HI +2
SETUP IMAG

KEY = C
A = 440 00 ¢
HI -1
SETUP IMAG

Display for +2 Mode Display for -1 Mode

NOTE - The Display +2 / -1 button is only active in the Run Mode, with the Run Mode screen showing as above.

3. TUNING TO A PITCH STANDARD OTHER THAN A=440

The International Standard pitch of A=440 Hertz (cycles per second) can be raised or lowered to any tuning frequency you
desire within a broad range. This range of adjustment for middle A (A4) is from A = 350 Hz to A = 550 Hz. This modified
standard pitch can be memorized in the Strobe Center 5000 so that the tuner powers-up calibrated for the selected pitch. The
currently selected pitch for "A" is displayed by the LCD indicator screen.

a. To change the pitch standard of the tuner use the following procedure. After the tuner has gone through the

power-up self-check it will then display the Run Mode screen with the standards you have previously chosen. New
from the factory the tuner is set to power-up on equal temperament at A=440Hz. This is shown on the second line
of the screen below as A=440:

OR

KEY = C
A = 440 00 ¢
HI
SETUP IMAG

1 2 3 4

b. From the Run Mode menu above, press key #1 (SETUP) to call up the Setup Menu shown next.

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SETUP MENU
PLEASE SELECT MODE

OPTN FILE RUN DIAG

1 2 3 4

c. Press key #1 OPTN (Option) once, and the tuner will display the screen for pitch recalibration:

RECALIBRATE TUNER?
NOW A = 440

NEXT RUN DOWN UP

Line two indicates current pitch of A.
Key #1 brings up the next screen menu.
Key #2 updates selected values and returns to Run Mode.
Key #3 lowers the pitch of A by 1 Hertz each time it is pressed.
Key #4 raises the pitch of A by 1 Hertz each time it is pressed.

1 2 3 4

d. Press key #3 to lower the pitch by 1 Hertz. Key #4 will raise the pitch in increments of 1 Hertz. You can press and

hold either button and the tuner will automatically step down to A=350 or up to A=550. Once the pitch is at the
desired frequency, press key #2 labeled RUN to return the tuner to the normal Run Mode screen. If you choose
the #1 function key labeled NEXT, you can proceed through the Image Clarifier and Store Memory screens before
returning to the Run Mode menu screen. Once you have returned to the Run Mode screen, notice that the display
will be changed to show the new pitch standard you have entered.

4. TUNING INSTRUMENTS THAT PLAY IN OTHER THAN THE KEY OF “C”

The Strobe Center 5000 solves one of the biggest difficulties of 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 correct note being played for all instruments in C, B=, F, and E=.

When the Strobe Center 5000 is displaying the normal Run Mode screen, simply press the front panel button labeled “KEY”.

Press this button once, twice, or three times to cycle the tuner between the musical instrument tuning keys of C, B=, F, and
E=. The pitch of the twelve tuning motors will change as the speed of each tuning disc is internally transposed to the new

tuning key. Sound your note and the tuning will show up on the corresponding tuning wheel. The key signature selected
will be shown in the upper left hand corner of the Run Mode screen.

KEY = xx
A = 440 00 ¢
HI
SETUP IMAG

1 2 3 4

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5. CUSTOMIZING THE START-UP MEMORY SETTINGS

If you desire the Strobe Center 5000 to always start-up in a different pitch standard than A=440, to a key other than "C"

(band directors may desire B=, for example), or with different settings of the Image Clarifier and +2/-1 DISPLAY controls,

it is easy to do.

a. In the Run Mode menu, make the adjustment to the key you desire by pressing the KEY button as just described.

Choose the display mode you desire of NORMAL, +2, or -1 by pressing the DISPLAY +2 / -1 button as described
previously.

b. Press the #1 function key to call up the Setup menu. Then press the #1 function key three more times (sequencing

through the #1 function key labels of OPTN {OPTION}, NEXT, and NEXT) to go through the screens of
RECALIBRATE TUNER?, and SET IMAGE CLARIFIER. As you proceed through each of these menus, check
that the settings are those you desire for the start-up memory values. You may adjust these values as needed until
you reach the menu screen:

STORE VALUES IN
MEMORY?

NO YES RUN

Key #1 returns to the Setup menu.
Key #2 saves new values and returns to the Setup menu.
Key #3 returns to Run Mode and uses new values.
(new value are not put into startup memory with #3)

1 2 3 4

c. You are now asked if you want to permanently store the choices you have just made into the "STANDARDS" or

power-up memory of the tuner. The power-up memory includes the user selection of the pitch frequency chosen
for middle A (A4), LOW or HIGH register for the Image Clarifier, the Display Mode (+2, -1, or NORMAL), and

the KEY in which your instrument is tuned (C, B=, F, or E=). The #2 key button (YES) will rewrite the power-up

memory of the tuner and return you to the Setup menu; key #1 (NO) will simply return you to the Setup menu
allowing you to re-sequence through the steps of the Setup menu to verify and/or reset your selections before
proceeding with the tuning process. Pressing the #3 key (RUN) will enter the new values you have selected and
return you directly to the Run mode; however, these new values will not be entered into the power-up memory.

KEY = xx
A = xxx 00 ¢
xxx xx
SETUP IMAG

1 2 3 4

d. At the Setup menu press key #3 labeled RUN to return to the normal running mode of the tuner. You are now ready

to begin tuning with the new parameters you have set.

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6. CHECKING INTONATION WITH THE SC-5000

When you desire to check your playing intonation, the tuner can assist in a very simple manner. You will need a partner
to adjust the pitch of the tuner to match the intonation of the note(s) you are checking.

When checking and adjusting your own intonation, it is useful to use an external microphone. Turn your back to the
tuner while playing your note so you don't see the indications on the tuning discs while your partner is making the
adjustments. That way you will be less likely to slowly change your intonation at the same time your partner is
adjusting the tuner.

a. Connect an external microphone to the Input connector of the tuner. Set this microphone on a stand so that you

can face away from the tuner.

b. Adjust the tuner to the tuning key of your instrument as detailed in Section 4 above. If necessary, raise or lower

the standard tuning pitch of the tuner by following Section 3.

c. You are now ready to begin. For the remainder of this section we will assume that your instrument is tuned in "C"

with a Concert A reference pitch of A = 440 Hertz. The normal Run Mode screen of the tuner will be displayed:

KEY = C
A = 440 xx ¢
HI
SETUP IMAG

1 2 3 4

d. Play your note into the microphone, while your partner watches the strobe windows. While you are sounding your

note, your partner will press the PITCH UP and/or PITCH DOWN buttons until the dark markings on the tuning
wheel corresponding to your note appear to be stationary. When these markings are stationary the tuner is in-tune
with the note you are playing.

e. The display will show the correctness of your intonation by indicating how many cents sharp or flat your partner

adjusted the tuner to match the note as you actually played it. This is presented in the "+" (sharp) or "-" (flat)
"XX.X" "¢" (cents) location of the display screen.

f. Musical tuning is measured by units called cents, representing a 1/100 division of a semitone. There are 1200 cents

in each octave, and exactly 100 cents between each half-step note in equal temperament tuning. The SC-5000 is
adjustable in a range of 1/2 semitone (+50.0 cents sharp to -50.0 cents flat) from being perfectly in tune
(00.0 cents) with the selected temperament and pitch.

7. ENHANCED RESOLUTION OF INTONATION MEASUREMENTS

As you continue to practice your intonation with the SC-5000, you will find that your pitch accuracy continually improves.
As you find yourself playing more and more closely to perfect intonation, you may desire that your partner adjust the tuner
more closely to your pitch. The SC-5000 has tuning accuracy to within 0.1 cent. The tuner may be adjusted to your note
within that same accuracy. The tuner always starts with a displayed resolution of 1 cent. This is shown as "00 ¢". When
operating in the Run Mode, the tuner can be set for enhanced resolution of either 0.5 cents or 0.1 cents. Press and hold the
ENTER key, then press either PITCH UP or PITCH DOWN and the resolution will be changed to 0.5 cents. To further

Page 10

enhance the resolution to 0.1 cent increments, first release the ENTER key, then press and hold it again while you press either
PITCH UP or PITCH DOWN. The display screen always presents enhanced resolution of 0.5 cents and 0.1 cents by showing
a decimal point and place: "xx.x ¢".

When the tuner is set for enhanced resolution, the PITCH UP/DOWN buttons increment the tuning adjustments of the tuner
in steps of 0.5 cents or 0.1 cents. This permits intonation measurements with an accuracy of 1/1000 semitone.

The resolution of the tuner may be returned to 1 cent resolution by again using the shifted key buttons for PITCH UP/DOWN
(press and hold the ENTER KEY while you press either PITCH UP or PITCH DOWN). The tuner resolution cycles through
a selection sequence of 1 cent, 0.5 cent, 0.1 cent, 1 cent, etc. Note that the tuner requires you to release the ENTER key
between each step of this resolution selection cycle. Then press and hold it again to go to the next step selection.

Other possible uses of the enhanced resolution of 0.5 cent, or 0.1 cent could be for exact measurements of precise partial tone
frequencies during the manufacture of percussive musical instruments (for example - bells, chimes, gongs, etc.), or for
specific scientific research into the timbrel structure of complex sounds and vibrations in the musical and audible frequency
spectrum.

8. ON-STAGE TUNING USING THE SC-5000 DURING A PERFORMANCE

You can measure your intonation during an on-stage performance by connecting a direct input to the external Input of the
tuner. This direct input can be another microphone, a clip-on pick-up, a direct feed from a mixing console, etc. Your
intonation precision and that of other performing partners can be visible to you and your performing ensemble as you observe
the SC-5000 during the performance. This same external Input may be patched through to the output connector and returned
to a mixing console as an extra signal source to the audience reinforcement. The internal microphone is automatically
bypassed whenever the external Input is connected to a signal source.

When using the external Input in the patch through mode to the Output connector, you and/or your performing partners may
want to tune-up your instruments while the audience is present. The Mute button permits you to execute a silent tuning
without disturbing your audience.

The Mute is a toggle function. Press the Mute button once, and the Input to Output patch through signal path connection
is interrupted. Press this same Mute button again, and the patch through connection is restored. The activated state for the
Mute Mode is indicated by the letter "M" on the regular Run Mode screen below the A = XXX indication as shown here:

KEY = C
A = xxx +00 ¢
M HI
SETUP IMAG

9. TUNING FOR NON-EQUAL TEMPERAMENTS

Equal temperament divides a musical octave into 12 equal semitones. The distance in pitch between any two neighboring
notes is exactly 100 cents (1200 cents making one musical octave). Since approximately 1850, Equal Temperament has been
commonly accepted as the standard musical tuning temperament - because any and all musical keys sound "equally" the same
and are completely enharmonic. All keys can be "equally" used - thus the name "Equal Temperament".

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Because the (twelfth root of two) mathematical ratios of equal temperament are not exactly in tune (in both the scientific and
historic sense of whole number ratios between all the twelve musical intervals in the chromatic scale - and particularly for
major thirds, fourths and fifths), many performers of fixed tuned instruments, such as harpsichords and organs, prefer to have
the instrument tuned so that certain keys and intervals sound more perfectly in tune and "sweeter" to their ears and those of
the audience.

Many musical history scholars claim that music composed prior to 1850 should be performed with historically specific
non-equal temperaments so that contemporary performances of this music will sound more exact to the audible intentions
of the composers. Tuning an instrument so that a particular key, or certain keys, sound in distinctly good tune while other
keys sound somewhat more roughly in tune (or have one or more completely unacceptable "wolf" keys) is known as tuning
in non-equal temperament. Use the following steps to select a non-equal temperament from the preprogrammed tables in
the Strobe Center 5000:

KEY=C
A=440 00 ¢
HI
SETUP IMAG

Key #1 calls up the Setup Menu.
Key #2 toggles the current Image Clarifier setting shown
on the third line of the LCD screen.

1 2 3 4

a. Press the #1 Function key to access the Setup Menu.

SETUP MENU

PLEASE SELECT MODE

OPTN FILE RUN DIAG

Key #1 calls up the additional option menus.
Key #2 proceeds to the File Menu screen
Key #3 returns the tuner to the Run Mode.
Key #4 is for running factory diagnostics.

1 2 3 4

b. From the Setup Menu, press the #2 Function Key named FILE. You will now see the display screen for the File

Menu:

FILE MENU
PLEASE SELECT MODE

TMPR STRCH SETUP

1 2 3 4

c. Press the #1 Function Key to see the Temperament Menu:

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Key #1 calls up the Temperament Menu.
Key #2 calls up the Stretch Menu
Key #4 returns to the Setup Menu.

TEMPERAMENT MENU
PLEASE SELECT MODE
START COPY
–EDIT –DEL RUN STOP

Key #1 is used to Start a TMPR file; also to use and/or
edit a new or existing TMPR file.
Key #2 Copies or Deletes a Custom TMPR file.
Key #3 returns the tuner to the Run Mode.
Key #4 Stops an active TMPR or STRCH File.

1 2 3 4

d. Press the #1 key labeled START-EDIT to call up the listing of all preprogrammed temperaments, and any custom

temperaments you have saved in the memory. The display screen will first show the 8 temperaments
preprogrammed into the Strobe Center 5000: The cursor is an underline beneath the first character of any file
name. In this first screen it shows as"E

QUA", with an underline under the "E" character.

SELECT TMPR =

QUA PYTH JUMA MEAN

E
WRK3 KRN3 YONG KLNR
NEW (EDIT) CNCL START

1 2 3 4

Key #1 begins the process of naming and editing a
new temperament file.
Key #2 is visible only from custom user files, and
goes to the Edit sequence for the file name at the
cursor.
Key #3 returns to the TEMPERAMENT MENU.
Key #4 activates the selected temperament and
returns to RUN Mode.

e. Use the Pitch Down and Pitch Up Keys (Down

Arrow - cursor forward and down; and Up Arrow - cursor up and back) to scroll the cursor through the
preprogrammed temperaments. When the cursor is on the eighth Name on any page of stored temperaments (in
this case YONG), press the Down Arrow key again and the tuner will display the first memory page of your custom
temperaments. Similarly, when the cursor is on the first Name of any custom temperaments screen, pressing the
Up Arrow key for the Back Cursor will show the previous page of custom or preprogrammed temperaments.

When the cursor is on the temperament memory file you desire, press the #4 function key to load this temperament
into the operation buffer of the tuner. The display will then return to the Run Mode screen and indicate the chosen
temperament file.

The temperaments listed on the screen above are the eight preprogrammed temperaments shipped with the Strobe
Center 5000. These eight temperaments are stored in a non-alterable, non-erasable memory of the tuner.
Remembering that there is always a perfect 2/1 frequency ratio (and 1200 Cents) between all octaves, each of the
eight Preprogrammed Temperaments are briefly described below:

EQUA - EQUAL TEMPERAMENT is the standard tuning scale in which the tuner powers up. There are exactly 100 Cents
between each note in the chromatic scale and 1200 Cents in each octave. Equal Temperament has been the standard musical
tuning used throughout the world since about 1850.

PYTH - PYTHAGOREAN TUNING is the most ancient method of tuning musical instruments in our recorded history of
Western music. This tuning was the musical standard for more than 1000 years, until the fourteenth century. It is based on
the exact, whole number frequency ratios of 2/1 for octaves, 3/2 for Perfect fifths, and 4/3 for Perfect fourths. The tuning

was started with the note E= and proceeded in an ascending circle of Perfect fifths (and descending octaves), ending on the
note G<. The interval E= - G< is much too wide to be usable and is known as a "wolf" tone. Major thirds are very wide,

and minor thirds are very narrow compared to the Equal Temperament to which we are accustomed. Thus, triads will sound

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