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The Korg CA-40
Electronic Chromatic Tuner is equipped with an output jack so you can
stay plugged. An extra-large LCD screen gives you excellent visibility.
Adjustable calibration range (410-480Hz). Tunes 6- and 7-string guitars
and 4-, 5-, and 6-string basses. Pure major/minor 3rd pitch indication
marks. "Quinta" flat tuning lets you tune down as much as 5 semitones.
Features reference tone, mic, speaker, and folding stand. Auto power
off and memory backup. Batteries included.
Wide Range of Pitch
Detection
This compact chromatic tuner supports a broad range of C1 (32.70 Hz)-C8
(4186.01 Hz), allowing speedy and high-precision tuning of wind,
string, keyboard, and other instruments. This tuner is ideal for tuning
even low-register notes containing numerous overtones that are often
difficult to tune. A high-sensitivity mic is built-in, allowing easy
and accurate tuning of acoustic instruments such as ukuleles. A
separately sold CM-100 contact mic can also be used to send the
vibrations directly to the tuner for even more accurate tuning.
Ultra-compact body with a
"Tilt Slit"
Although the CA-30 is small, thin, and light, don't let its
pocket-sized body fool you. The CA-30 packs the functionality needed
for tuning a wide range of instruments. From studio to stage, tuning is
easy and convenient. The back of the unit includes a unique arc-shaped
"tilt slit" that lets you insert a plastic card for use as a handy
stand.
High-precision LCD Meter
The meter section uses a LCD needle, combining the accuracy of an LCD
with the easy visibility of a needle, and providing a stable display.
Additional visual feedback is provided by LEDs that indicate pitch
deviation.
Sound Out - Internal
Speaker Provides a Reference Pitch
In addition to visual tuning via meter, the CA-30 can play reference
pitches from its internal speaker (Sound Out) for tuning by ear. Each
press of the Sound switch will cycle through the A4-Bb4 notes commonly
used for tuning wind instruments. Or you can hold down the Sound switch
to change the cycle to the semitone intervals from C4 through C5 (one
octave), allowing reference pitches for any instrument to be sounded
quickly.
Calibration Function
The Calibration function (410-480 Hz) supports a wide range of standard
pitches, and can be adjusted in 1 Hz steps for accurate and flexible
tuning to any song or key. Thanks to the Memory Backup function, the
Calibration and reference pitch are remembered even when the power is
turned off. (However, these settings will be initialized when the
batteries are replaced.)
Auto Power Off Function
If you leave the unit powered-on for 20 minutes without performing any
operation, the Auto Power Off function will turn the power off
automatically, avoiding unnecessary battery consumption.
Approximately 100 hours
of Continuous Use
Low-power consumption design allows an amazing 100 hours (approximate)
of continuous battery life (A4 continuous input, Meter mode,
zinc-carbon batteries).
Korg tuners and metronomes purchased from a Korg USA authorized dealer
now have a three year warranty.
Korg CA-40 Electronic Chromatic Tuner Specifications:

