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Flat Tuning
Flat tuning lowers the pitch of all notes below the regular tuning from one to six semitones. To change the number of flats, hold the FLAT button while turing the tuner on. The Flat LED will flash, and the note display will show the number of flats. Pressing the FLAT button will advance the number of flats. Pressing the CAL key will save the number of flats and return to normal operation.
When the number of flats is anything other than zero, the Flat LED will be illuminated.
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Changing the Reference Pitch
The default reference pitch is A4=440 Hz. This can be changed in .1Hz increments to any value from 300.0 Hz to 599.9 Hz.
To change the reference pitch, press the CAL button while turning the tuner on. The A4 LED will flash, and the current setting of A4 will scroll through the note display.You then press the CAL button to scroll through the current setting, and use the FLAT button to change each digit.
After the desired value has been entered, press the CAL button until the note display is blank, and press the FLAT button. The tuner will now resume normal operation.
Whenever the A4 reference is set to anything other than 440.0 Hz, the A4 LED will be illuminated.
The Clear Key
Holding down both buttons while turning on the power will have the following effect:
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Editing A Tuning
You may edit the notes of any tuning except Chromatic. A tuning may have up to 9 strings.
This section is under construction. Please check back later.
Please refer to the PDF manual available here -> 
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Temperaments
Any of the five modes other than Chromatic may be set as an alternate temperament. When set to a temperament, the tuner will respond to all 12 notes of the chromatic scale, and each note may be offset by up toe ±50.0 cents in .1 cent increments.
This section is under construction. Please check back later.
Please refer to the PDF manual available here -> 
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Specifications
Dimensions |
4.4" (11.2cm) x 2.4" (6.1cm) x 1.4" (3.4cm) HxWxD |
Weight |
246 g / 8.7 oz (including battery) |
Output |
True bypass, muted output. Zero load on signal when tuner is off. Output muted when tuner is on. |
Tuning Range |
C0 (16.35 Hz) to C8 (4,186.0 Hz) |
Accuracy |
+/- .02 Cents (calibrated crystal oscillator) |
Reference Pitch |
A4 = 300.0 Hz to 599.9 Hz in .1 Hz increments. |
Jacks |
Input, Output (1/4") and external 9 VDC |
Power Supply |
9 Volt Alkaline Battery(included), or external 9 Volt DC adapter (optional). |
Power Consumption |
43 mA typ. Gives 12 Hour continuous operation with alkaline battery. |
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