Thank you for purchasing the Korg CA-40 chromatic tuner.
4015-2 Yanokuchi, Inagi-city, Tokyo 206-0812 Japan
2005 KORG INC.
Using the unit in the following locations can result in a malfunction.
• In direct sunlight
• Locations of extreme temperature or humidity
• Excessively dusty or dirty locations
• Locations of excessive vibration
• Close to magnetic fields
Be sure to turn the power switch to OFF when the unit is not in use.
Remove the battery in order to prevent it from leaking when the unit is not
in use for extended periods.
Interference with other electrical devices
Radios and televisions placed nearby may experience reception interfer-
ence. Operate this unit at a suitable distance from radios and televisions.
To avoid breakage, do not apply excessive force to the switches or controls.
If the exterior becomes dirty, wipe it with a clean, dry cloth. Do not use
liquid cleaners such as benzene or thinner, or cleaning compounds or
Keep this manual
After reading this manual, please keep it for later reference.
Keeping foreign matter out of your equipment
Never set any container with liquid in it near this equipment. If liquid gets
into the equipment, it could cause a breakdown, fire, or electrical shock. Be
careful not to let metal objects get into the equipment.
THE FCC REGULATION WARNING (for U.S.A.)
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Unauthorized changes or modification to this system can void the user's
authority to operate this equipment.
CE mark for European Harmonized Standards
CE mark which is attached to our company's products of AC mains
operated apparatus until December 31, 1996 means it conforms to EMC
Directive (89/336/EEC) and CE mark Directive (93/68/EEC).
And, CE mark which is attached after January 1, 1997 means it conforms
to EMC Directive (89/336/EEC), CE mark Directive (93/68/EEC) and
Low Voltage Directive (73/23/EEC).
Also, CE mark which is attached to our company's products of Battery
operated apparatus means it conforms to EMC Directive (89/336/EEC)
and CE mark Directive (93/68/EEC).
IMPORTANT NOTICE TO CONSUMERS
This product has been manufactured according to strict specifications
and voltage requirements that are applicable in the country in which it
is intended that this product should be used. If you have purchased this
product via the internet, through mail order, and/or via a telephone
sale, you must verify that this product is intended to be used in the
country in which you reside.
WARNING: Use of this product in any country other than that for
which it is intended could be dangerous and could invalidate the
manufacturer's or distributor's warranty.
Please also retain your receipt as proof of purchase otherwise your product
may be disqualified from the manufacturer's or distributor's warranty.
Installing the batteries
Slide and remove the battery compartment
cover located on the back of the CA-40. Insert
the batteries ensuring that you observe the
correct polarity, and replace the cover.
If the CA-40 malfunctions and you are unable to solve the
problem by turning the power off and on again, try removing
the batteries and then reinstall them.
The included batteries are provided for the purpose of verifying
operation and therefore may have a shorter lifetime than usual.
When the batteries run low, a battery
indicator will appear in the left of the
display. When this indicator appears, replace
the batteries as soon as possible. Power-off
the CA-40 before you replace the batteries.
Using the stand
By opening the stand located on the back,
you can position the CA-40 at a conve-
Using the tuner
[SOUND/NOTE SELECT] button
This mode lets you tune using the meter in the display.
1 Connect the tuner. The connection method will depend on the type
of instrument you're connecting.
When tuning an instrument that has a pickup
Be sure to use an instrument cable for connection to the CA-40's
You can't use the internal mic if a plug is inserted in the INPUT jack.
If you're performing on stage, it is convenient to use the CA-40's
OUTPUT jack. Connect your instrument to the CA-40's INPUT jack,
and then connect your amp to the OUTPUT jack. The sound of your
instrument will be sent from the CA-40's OUTPUT jack to your amp,
allowing you to tune or perform while the CA-40 remains connected.
If you've connected the OUTPUT jack to your amp etc., you
must insert a cable into the INPUT jack. If nothing is con-
nected to the INPUT jack, the internal mic will be automati-
cally used. In this case, sound entering the internal mic could
cause feedback, possibly damaging your amp.
When tuning an acoustic instrument
If you're using a separately sold Korg CM-100 contact mic,
connect the CM-100's plug to the CA-40's INPUT jack. If you're
using the internal mic, don't connect anything.
2 Press the [STANDBY/ON] button.
The CA-40 will be in Meter mode. The upper left of the display
shows the calibration (reference pitch) you specified most recently.
The power will turn off automatically if the tuner is not used for
approximately twenty minutes.
3 If you want to change the calibration setting, press the CALIB [ ]
or [ ] buttons.
The calibration setting will change in steps of 1 Hz. If you hold down
the button, the calibration setting will increase or decrease continuously.
4 Play a single note on your instrument.
The name of the note closest to the note you played will appear
in the upper right of the display. Tune your instrument so that
the desired note name appears.
If you're using the internal mic, position the mic as close as
possible to your instrument, and ensure that extraneous back-
ground sounds are not picked up by the mic while tuning.
5 While playing a single note, tune your instrument so that the indi-
cator in the center of the tuning guide is lit.
The left indicator of the tuning guide will light if the pitch of
your instrument is too low, and the right indicator will light if
the pitch is too high.
6 If you want to tune to a pure major third or pure minor third above a
certain note, use the " " (-13.7 cent) or " " (+15.6 cent) marks of the meter.
Tuning to a pure major third or pure minor third
If you want to tune your instrument to a pitch that is a pure major
third above A (0 cents), make the note name indicator read C#, and
tune your instrument so that the meter indicates the " " position.
If you want to tune your instrument to a pitch that is a pure minor
third above A (0 cents), make the note name indicator read C, and
tune your instrument so that the meter indicates the " " position.
Sound Out mode
This mode lets you listen to a reference tone while you tune your instrument.
1 Perform steps 2 and 3 of "Meter mode."
2 Press the [SOUND/NOTE SELECT] button.
The CA-40 will be in Sound Out mode, and the speaker will play
a reference tone.
Hold down the [SOUND/NOTE SELECT] button, and use the
CALIB [ ] [ ] buttons to change the pitch of the reference tone
that is audible from the speaker. The pitch will change in the
CALIB[ ], [ ] buttons
A ÷ B ÷ B ÷ C (C5) ÷ C (C4) ÷ C# ÷ D ÷ E ÷ E ÷ F ÷
F# ÷ G ÷ G# ÷ A ÷ ...
3 Tune your instrument to match the reference tone.
Detection range: A0 (27.50 Hz) – C8 (4186.01 Hz): for a sine wave
Calibration range: A4=410 Hz–480 Hz (1 Hz steps)
Detection accuracy: ±1 cents or better
The calibration setting and the Sound Out reference pitch are remembered
even when you turn off the power. However when you replace the batteries,
these settings will be initialized to the default values; the calibration will
return to 440 Hz, and the Sound Out reference pitch will return to A.
Even if the pitch is within the range of detection, the CA-40 may be unable to
detect the pitch if the sound contains numerous overtones (such as the low
and high notes on an acoustic piano) or if the instrument has a rapid decay.
* Specifications and appearance are subject to change without notice for
improvement of the product.
12-note equal temperament
C4 (261.63 Hz) – C5 (523.25 Hz): 1 octave
Meter mode (AUTO), Sound Out mode (MANUAL)
±1.5 cents or better
INPUT jack (1/4" mono phone jack)
OUTPUT jack (1/4" mono phone jack)
Dynamic speaker (28 mm diameter)
Two AAA batteries (3 V)
Approximately 85 hours (Meter mode, continu-
ous A4 input, zinc-carbon batteries)
100 mm (W) x 67mm (D) x 17mm (H)
3.94" (W) x 2.64" (D) x 0.67" (H)
69g (without batteries), 88g (with batteries)
2.43oz. (without batteries), 3.10oz. (with batteries)
Owner's manual, two AAA batteries for