- POWER button
Turns the power on/off.
If you leave the power turned on for approximately twenty minutes, it will turn off automatically. - MODE button
Switches the tuning mode. Each time you press the MODE button, the tuning mode will cycle between the following settings.
AUTO GUITAR - MAN.GUITAR - AUTO BASS - MAN.BASS - FUNCTION button
Select the type of adjustment you want to make: PITCH, NOTE, or FLAT.
(You can select NOTE only if you're in MAN. (manual) tuning mode.) - buttons
Adjust the parameter you've selected using the FUNCTION button. - PITCH: Reference pitch setting (calibration)
Adjust the reference pitch (A4) in the range of 435~445 Hz (1 Hz steps). - NOTE: Note setting
When in MAN. (manual) mode, select the note to which you want to tune, from the following choices. NOTE: 6E, 5A, 4D, 3G, 2B, 1E, 7B (electric guitar, acoustic guitar) 4E, 3A, 2D, 1G, HC, LB (bass guitar) - FLAT: Flat setting
Adjust the flatted tuning relative to the displayed note. You can tune to a flatted tuning from one to five semitones below the displayed note.
- SOUND button
Sounds a reference tone from the internal speaker. This lets you tune while comparing the output sound of your instrument to the reference tone.
You can use the FUNCTION button and the buttons to specify the note and flatted setting for the reference tone.
Note) When using the SOUND output, the PITCH is fixed at 440 Hz. This cannot be changed. - Liquid Crystal Display (LCD)
* When you turn the power on, the LCD will show the following settings.
MODE = AUTO GUITAR
FUNCTION = PITCH
PITCH = 440 Hz
- MODE: AUTO GUITAR, MAN GUITAR, AUTO BASS, MAN BASS
- NOTE: MAN.GUITAR 6E, 5A, 4D, 3G, 2B, 1E, 7B
MAN.BASS 4E, 3A, 2D, 1G, HC, LB - FUNCTION: PITCH, NOTE, FLAT
- : When the tuning is correct, the needle will stop in the center, and the "" and "#" indications will both appear. The "" indication appears if your instrument is flatter than the displayed note, and the "#" indication appears if your instrument is sharper.
- : Indicates the flatted tuning setting.
- Reference pitch: Indicates the currently-specified reference pitch.
- INPUT jack
You can connect your instrument to this input jack. If you're tuning an electric guitar, acoustic-electric guitar, or electric bass, connect the output of your instrument to the GU40's INPUT jack.
However in this case, you won't be able to use the GU40's internal mic. - OUTPUT jack
This jack directly outputs the signal that is being input. You can connect this jack to your amp. However to prevent hum or other noise while you're performing, turn off the power of the tuner. - MICROPHONE
Use the internal mic when you want to tune an instrument that has no pickup, such as an acoustic guitar. However, the internal mic cannot be used if a plug is inserted in the INPUT jack. - Tuning guide LEDs
The green LED in the center will light when your instrument matches the displayed note. The red LED at the left will light if your instrument is flat, and the red LED at the right will light if your instrument is sharp.
Tuning Procedure
For accurate tuning
- Don't use this tuner near sound equipment such as radios or televisions.
- When tuning an electric guitar/bass, use a moderate volume for best tuning results.
- In order to tune strings faster, mute all strings by hand after you've finished tuning each string.
Tuning in Auto mode
- Electric instruments: Connect the output of yourinstrument to the input jack of the tuner.
Acoustic instruments: Use the internal mic. - When you turn on the power, the GU40 is automaticallyset to MODE=AUTO GUITAR and PITCH=440 Hz.
- Change the PITCH and FLAT settings if desired.
- If you're tuning a bass guitar, use the MODE button toselect AUTO BASS.
- If the pitch of the string is more than ±50 cents away from the correct pitch, tune the string until the correct note name appears in the LCD and one of the tuning guide LEDs is lit.
When the pitch of the string is within ±50 cents of the correct pitch, tune the string to make the needle stop at the "0" position. - When the tuner needle stops at "0," the green LED inthe center will light. Tuning is complete.
Tuning in Manual mode
- Electric instruments: Connect the output of yourinstrument to the input jack of the tuner.
Acoustic instruments: Use the internal mic. - .When you turn on the power, the GU40 is automaticallyset to MODE=AUTO GUITAR and PITCH=440 Hz.
- Change the PITCH and FLAT settings if desired.
- Use the MODE button to select MAN. GUITAR or MAN.BASS.
Use the FUNCTION button to select NOTE, and use thebuttons to select the note that you want to tune. - If the pitch of the string is more than ±50 cents away from the correct pitch, tune the string until the correct note name appears in the LCD and one of the tuning guide LEDs is lit.
When the pitch of the string is within ±50 cents of the correct pitch, tune the string to make the needle stop at the "0" position. - When the tuner needle stops at "0," the green LED inthe center will light. Tuning is complete.
Tuning by Sound
- When you press the SOUND button, MODE will be setto MAN. GUITAR or MAN.BASS, FUNCTION will be set to NOTE, the NOTE indication will be 5A (GUITAR) or 3A (BASS), and that pitch will be sounded.
- Tune your instrument to match the pitch you hear fromthe GU40's internal speaker.
- Change the NOTE or FLAT settings accordingly.
Installing/replacing the batteries
- Pull the tab of the battery cover.
- Lift the battery cover with the tab.
- Replace the batteries and put the battery cover back.
Specifications
Modes: Auto Tuning and Manual Tuning modes
Tuning range: A0 (27.50 Hz) ~ C8 (4,186.00 Hz)
Tuning notes: 5A, 4D, 3G, 2B, 1E, 7B, 6E
(electric guitar, acoustic guitar)
3A, 2D, 1G, HC, LB, 4E
(electric bass, acoustic bass)
Flat tuning: 1~ 5 semitones
Accuracy: ±1 cent or less
Calibration: 435 Hz ~ 445 Hz
Indicators: LCD and LEDs
Input: Internal mic, INPUT jack
Output: Internal speaker, OUTPUT jack
Power supply: Two AAA batteries (3V)
Dimensions: 109 (W) x 73 (D) x 20 (H) mm Weight: 120 g (including batteries)
* Design and specifications are subject to change without notice for improvement of the product.
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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