Korg OT-120 Orchestral Tuner

SKU: OT120

In Stock

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The tuner of choice for classical and early music instrumentalists. Pitch and temperament calibration!

Vertical-design and superior visibility The OT-120 is a chromatic tuner intended for the orchestra, packaging high 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 level, sound output level, calibration, key and note name. Additional design features include a large dial that makes it easy to select the desired mode, finger-friendly buttons and a rear-mounted stand that lets the unit stand by itself. A sophisticated silver aluminum panel contributes to its sleek, new look.


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) – C8 (4186 Hz)
Reference Tone:
C2 (65.41 Hz) – C7 (2093 Hz), five octave, two-step volume control
Tuning Modes
A4 = 349 – 499 Hz (1 Hz step)
Detection Accuracy
± 1 cent
Tone Accuracy
± 1.5 cent
INPUT (1/4” phone jack), OUTPUT (1/4” phone jack), DC IN (9 V)
Power Supply
Two AAA batteries, or AC adapter (separately sold)
Battery Life
approx. 100 hours (with alkaline batteries, in meter mode (MEDIUM), A4 tone continuously input, without backlit)
(W x D x H)
74 x 120 x 36 mm / 2.91” x 4.72” x 1.42”
193 g (including batteries) / 6.81 oz. (including batteries)
two alkaline AAA batteries for checking operation, a suede-tone soft case
AC adapter



Brand Korg
Categories Instrument Tuners
Temperament Tuners

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