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Korg Chromatic Tuner
a personal favorite
Ultra-compact, LCD Needle-Style Chromatic Tuner
 This little tuner has long been a favorite of mine (and Mark's!) for use with upright bass as well as with electric. Unlike earlier LED/LCD units, the "meter" is quick and responsive as well as more stable than some of the actual mechanical meter units I've owned (including an earlier Korg I still have). It's tiny but still has all the features you'd want, and more than you would expect. I've even used this little guy to intonate my six string electric basses, and the built-in mic makes it easy to tune my upright bass, so I had to include it in my offerings. Here are some of the details:
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 or business 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).
* Even if the pitch is within the detection range, detection may not be possible for instrumental sounds that contain a large number of overtones or have a rapid decay.
 Features:
- Compact chromatic tuner, ideal for any instrument.
- High-precision LCD needle-type meter for stable tuning.
- Wide range of pitch detection covers C1 (32.70Hz) - C8 (4186.01Hz)
- Calibration function supports a variety of concert pitches: 410 - 480Hz (1Hz steps)
- Sound Out produces a reference tone (electronic pitch pipe) from the internal speaker: C4 (261.33Hz) - C5 (523.25Hz)
- Auto Power Off function conserves battery life, rated at approximately 100 hours of continuous use.
- Memory Backup function.
- Tuning: 12 note equal-tempered
- Tuning modes: Meter (auto), Sound (manual)
- Tuning accuracy: +/-1cent
- Sound accuracy: +/-1.5cent
- Connection jack: Input jack (1/4" mono)
- Power supply: Two AAA batteries 3V
- Dimensions: 4.1"(104mm) Wide x 2.52"(64mm) Deep x 0.6(15mm) High
- Weight: 2.86 oz (81g) (Including the batteries)
- Included items: Owner's Manual, (2) AAA batteries
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