Item #: KOR OT120 LIST

Korg OT120 Chromatic Orchestral Tuner

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Product Description

The Korg OT120 lets you tune string and wind instruments in a flash!
The OT120 is a new tuner that combines the accuracy of needle-type meters with superior functionality, wide tuning range and a new, sleek vertical design.

Korg Achieves a Milestone!

Over 20 Million Tuners Sold!3 Year Warranty Over 30 years ago, Korg invented the world's first hand-held electronic tuner.Today, Korg is an established authority on tuning, with a full line of accurate and reliable tuners chosen by professional and beginning musicians alike.

To mark the occasion, KORG USA has increased the warranty on all of its tuners and metronomes sold in the U.S. to three years. Customers can stay perfectly in tune with the latest in Korg tuner technology, backed by the high quality of these products plus years of guaranteed performance.

Korg OT120 Features
  • Chromatic tuner with a wide 8 octave detection range that supports band and orchestra instruments
  • Dual display provides both a needle-type meter and an LCD for excellent visibility
  • Sound Back (Patented: Patent pending) mode plays a reference pitch for the note that's closest to the input pitch. The meter indicates the discrepancy between the input and the correct pitch
  • Multiple Temperaments support historical tunings
  • Transpose mode is convenient for wind instruments
  • Choose from three levels of needle response speed (slow, medium and fast)
  • Both auto and manual tuning modes are provided
  • Built-in reference tone plays in a five octave range
  • Broad range of calibration (349 Hz--499 Hz)
  • Built-in mic supports acoustic instruments
  • Use with the optional CM-100 Contact Mic for accurate tuning in noisy environments
  • Energy-saving design for long battery life (approximately 100 hours)
  • A durable, suede-tone soft case is included
Vertical Design and Superior Visibility
The OT120 chromatic tuner is intended for orchestral instruments, packing precise performance and sophisticated functionality in a vertical design that's easy to hold and operate. It features a dual-display, an easy-to-see needle-type indicator and a backlit LCD screen that shows the battery life, sound output level, calibration, key and note name. Additional design features include a large dial that makes it easy to select the desired mode, soft-touch buttons and a rear-mounted stand that lets the unit stand by itself. A sophisticated silver aluminum panel contributes to its sleek, new look.

Accurately Tune Orchestral Instruments Over A Wide Range
Since we developed the world's first meter-type tuner in 1975, the accuracy of Korg tuners has made them the choice of artists in all styles of music. With its wide tuning range extending from A0 to C8, the OT-120 lets you quickly tune any type of band instrument including, orchestra, wind, string, brass or piano. The OT-120 also provides a wide range of calibration to support concert pitches in a range of A440=349-499 Hz (1 Hz steps).

Smooth and Precise Tuning You Expect from a Needle-Type Meter
The OT120 uses a high-precision needle-type meter to accurately indicate any pitch discrepancy. The speed at which the needle responds to the input can be changed over a range of three steps; you can choose fast, medium or slow to match your tuning preference.

You can also choose from two tuning modes; Auto mode, which automatically detects the pitch of a single note you play on your instrument, or Manual mode, which lets you specify the desired note name. In Manual mode the needle movement is shown in a range of ±50 cents, letting you view the tuning discrepancy over a wide range. In addition to the excellent visibility unique to a needle-type meter, the LEDs located below the meter also indicate pitch deviation or a perfect match, making precise tuning easy even in dim locations.

Sound Back Mode Provides a Reference Tone that's Ideal for Tuning String or Wind Instruments
The OT120 produces a reference tone in a five-octave range extending from C2 (65.41 Hz) to C7 (2093 Hz). You can switch the output level in two stages. The large speaker allows for more volume while not being obstructed even when using the stand, ensuring that the reference tone is clearly audible.

The OT120 also provides Korg's proprietary Sound Back mode. This mode lets you connect an optional CM-100 contact mic to the input jack, and automatically make the OT120's speaker produce a reference tone for the note that is closest to the input pitch you play on your instrument. The meter will also indicate the input pitch, letting you tune using your eyes as well as your ears for greater accuracy and also providing a great way to train your sense of pitch.

Support for Transposing Instruments and Historical Temperaments
For conveniently tuning any wind instrument, twelve types of transposing keys are provided including both sharps and flats. The Multi Temperament function provides eight presets that cover the most popular historical temperaments often used with period instruments. These are also ideal for checking unique temperaments used in classical music.

Long Battery Life
The OT120 is designed for an extended battery life of approximately 100 hours when running on two AAA batteries. It can also be used with an AC adaptor (sold separately).
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Helpful Info about the Manufacturer
Phone:  631-390-6500 Warranty:  1 year parts and labor; US Customers – register your Korg keyboard, keyboard workstation, keyboard rack module or digital piano online and receive a certificate that extends the product warranty for an extra year from the date of purchase. This offer is good for mdse purchased from an authorized Korg dealer after November 1, 2002.

Product Specifications

Korg OT120 Chromatic Orchestral Tuner Specifications
  • Scale:
    • 12 equal tempered
    • Pythagorean
    • Werckmeister III
    • Vallotti
    • Mean Tone Eb
    • Kirnberger III
    • Young
    • Mean Tone D#
    • Kellner
  • Transpose Range: C, C#, D, Eb, E, F, F#, G, G#, A, Bb, B
  • Detection Range: A0 (27.50 Hz) to C8 (4186 Hz)
  • Reference Tone: C2 (65.41 Hz) to C7 (2093 Hz) five octave
  • Tuning Modes
    • MANUAL
  • Calibration: A4 = 349-499 Hz (1 Hz steps)
  • Detection Accuracy: ± 1 cent
  • Sound Accuracy: ± 1.5 cent
  • Connections:
    • INPUT: Quarter-inch jack
    • OUTPUT: Quarter-inch jack
    • DC IN (9 V)
  • Power Supply Two AAA batteries, or AC adapter (sold separately)
  • Battery Life: Approx 100 hours (Meter mode without backlit)
  • Included Accessories Two AAA batteries and a suede-tone soft case
  • Dimensions (WxDxH): 2.91 x 4.71 x 1.42 inches (74 x 120 x 36 mm)
  • Weight: 6.81 oz (193 g) including batteries

Customer Reviews

Review: Michael Dempsey, Submitted: 8/5/2019

Product Rating5 out of 5 stars.


No longer trust cheap clip on tuners?
Product Rating

Product Review

I owned a Seiko tuner quite a while ago and have always lamented its disappearance. It seemed like all you could buy for a lomg time wre the clip on, some of better quality than others. I was surprised when I saw a few companies making "real" tuners again. I jumped at the chace to buy this one, with its fold back stand and features. Intonates a 5 string bass like a dream. Happy.

Review: lonnie mansell, Submitted: 10/7/2018

Product Rating5 out of 5 stars.



great tuner !!

Product Review

i play bass and some tuners wont pick up the bass well, especially the "E"string. the korg ot120 does. i like the ability to hear the note which allows me to get close when installing new strings then switch to meter to get dead on.

Review: Timothy A. Timmermans, Xtremefullforce@yahoo.con Submitted: 7/7/2017

Product Rating5 out of 5 stars.



Well worth the money!

Product Review

EXCELLENT!!! Works very well and is a key component in my arsenal.
AMS Responds:

Review: Ed from Ridgefield, Connecticut, USA Submitted: 5/16/2012

Product Rating4 out of 5 stars.


Perfectly adequate and affordable

I am not going to open up the case, which is plastic. The controls work adequately and the meter response is adjustable. I have owned this for a couple of weeks and it still works, ask agin in a couple of years.

I have owned this for a couple of weeks and it shows no early signs of failure. ask again later.

Your general opinion of this product.

Completely adequate for my use, and it comes in a nice travel casse.

Some controls feel insubstantial; we will see how this holds up.

This detects tone, and it seems to do so regardless of the source. It has a tone generator that I have not used.

Plastic case looks nice but feels insubstantial.

Works fine.


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